397157327 has 4 divisors (see below), whose sum is σ = 453894096. Its totient is φ = 340420560.

The previous prime is 397157317. The next prime is 397157359. The reversal of 397157327 is 723751793.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 397157327 - 2¹⁶ = 397091791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397157317) 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 in 3 ways as a sum of consecutive naturals, for example, 28368374 + ... + 28368387.

It is an arithmetic number, because the mean of its divisors is an integer number (113473524).

Almost surely, 2^397157327 is an apocalyptic number.

397157327 is a deficient number, since it is larger than the sum of its proper divisors (56736769).

397157327 is an equidigital number, since it uses as much as digits as its factorization.

397157327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56736768.

The product of its digits is 277830, while the sum is 44.

The square root of 397157327 is about 19928.8064620037. The cubic root of 397157327 is about 735.0567324743.

The spelling of 397157327 in words is "three hundred ninety-seven million, one hundred fifty-seven thousand, three hundred twenty-seven".