199901029 has 2 divisors, whose sum is σ = 199901030. Its totient is φ = 199901028.

The previous prime is 199901021. The next prime is 199901057. The reversal of 199901029 is 920109991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136936804 + 62964225 = 11702^2 + 7935^2 .

It is a cyclic number.

It is not a de Polignac number, because 199901029 - 2³ = 199901021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199900982 and 199901000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199901021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99950514 + 99950515.

It is an arithmetic number, because the mean of its divisors is an integer number (99950515).

Almost surely, 2^199901029 is an apocalyptic number.

It is an amenable number.

199901029 is a deficient number, since it is larger than the sum of its proper divisors (1).

199901029 is an equidigital number, since it uses as much as digits as its factorization.

199901029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 199901029 is about 14138.6360374684. The cubic root of 199901029 is about 584.7070674064.

The spelling of 199901029 in words is "one hundred ninety-nine million, nine hundred one thousand, twenty-nine".