199919701 has 2 divisors, whose sum is σ = 199919702. Its totient is φ = 199919700.

The previous prime is 199919689. The next prime is 199919747. The reversal of 199919701 is 107919991.

It is a happy number.

199919701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (199919747) can be obtained adding 199919701 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147646801 + 52272900 = 12151^2 + 7230^2 .

It is a cyclic number.

It is not a de Polignac number, because 199919701 - 2²¹ = 197822549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199919101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99959850 + 99959851.

It is an arithmetic number, because the mean of its divisors is an integer number (99959851).

Almost surely, 2^199919701 is an apocalyptic number.

It is an amenable number.

199919701 is a deficient number, since it is larger than the sum of its proper divisors (1).

199919701 is an equidigital number, since it uses as much as digits as its factorization.

199919701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 46.

The square root of 199919701 is about 14139.2963403417. The cubic root of 199919701 is about 584.7252719324.

It can be divided in two parts, 19991 and 9701, that added together give a palindrome (29692).

The spelling of 199919701 in words is "one hundred ninety-nine million, nine hundred nineteen thousand, seven hundred one".