447931157 has 2 divisors, whose sum is σ = 447931158. Its totient is φ = 447931156.

The previous prime is 447931097. The next prime is 447931201. The reversal of 447931157 is 751139744.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365230321 + 82700836 = 19111^2 + 9094^2 .

It is a cyclic number.

It is not a de Polignac number, because 447931157 - 2²⁴ = 431153941 is a prime.

It is a super-2 number, since 2×447931157² = 401284642822717298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447931457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223965578 + 223965579.

It is an arithmetic number, because the mean of its divisors is an integer number (223965579).

Almost surely, 2^447931157 is an apocalyptic number.

It is an amenable number.

447931157 is a deficient number, since it is larger than the sum of its proper divisors (1).

447931157 is an equidigital number, since it uses as much as digits as its factorization.

447931157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 447931157 is about 21164.3841630226. The cubic root of 447931157 is about 765.1332770769.

The spelling of 447931157 in words is "four hundred forty-seven million, nine hundred thirty-one thousand, one hundred fifty-seven".