189397913 has 2 divisors, whose sum is σ = 189397914. Its totient is φ = 189397912.

The previous prime is 189397891. The next prime is 189397933. The reversal of 189397913 is 319793981.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186923584 + 2474329 = 13672^2 + 1573^2 .

It is a cyclic number.

It is not a de Polignac number, because 189397913 - 2⁸ = 189397657 is a prime.

It is not a weakly prime, because it can be changed into another prime (189397933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94698956 + 94698957.

It is an arithmetic number, because the mean of its divisors is an integer number (94698957).

Almost surely, 2^189397913 is an apocalyptic number.

It is an amenable number.

189397913 is a deficient number, since it is larger than the sum of its proper divisors (1).

189397913 is an equidigital number, since it uses as much as digits as its factorization.

189397913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 50.

The square root of 189397913 is about 13762.1914315998. The cubic root of 189397913 is about 574.2818133627.

The spelling of 189397913 in words is "one hundred eighty-nine million, three hundred ninety-seven thousand, nine hundred thirteen".