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199880929 is a prime number
BaseRepresentation
bin10111110100111…
…11000011100001
3111221010000002101
423322133003201
5402132142204
631500050401
74644650143
oct1372370341
9457100071
10199880929
11a2911556
1256b33a01
1332545051
141c790c93
1512833ea4
hexbe9f0e1

199880929 has 2 divisors, whose sum is σ = 199880930. Its totient is φ = 199880928.

The previous prime is 199880867. The next prime is 199880953. The reversal of 199880929 is 929088991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124277904 + 75603025 = 11148^2 + 8695^2 .

It is an emirp because it is prime and its reverse (929088991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199880929 - 227 = 65663201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199880929.

It is not a weakly prime, because it can be changed into another prime (199880999) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99940464 + 99940465.

It is an arithmetic number, because the mean of its divisors is an integer number (99940465).

Almost surely, 2199880929 is an apocalyptic number.

It is an amenable number.

199880929 is a deficient number, since it is larger than the sum of its proper divisors (1).

199880929 is an equidigital number, since it uses as much as digits as its factorization.

199880929 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 55.

The square root of 199880929 is about 14137.9252013865. The cubic root of 199880929 is about 584.6874693649.

It can be divided in two parts, 199 and 880929, that added together give a triangular number (881128 = T1327).

The spelling of 199880929 in words is "one hundred ninety-nine million, eight hundred eighty thousand, nine hundred twenty-nine".