397057272949 has 4 divisors (see below), whose sum is σ = 397129747360. Its totient is φ = 396984798540.

The previous prime is 397057272923. The next prime is 397057272973. The reversal of 397057272949 is 949272750793.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397057272949 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 (397057272649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36228987 + ... + 36239944.

It is an arithmetic number, because the mean of its divisors is an integer number (99282436840).

Almost surely, 2^397057272949 is an apocalyptic number.

It is an amenable number.

397057272949 is a deficient number, since it is larger than the sum of its proper divisors (72474411).

397057272949 is an equidigital number, since it uses as much as digits as its factorization.

397057272949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72474410.

The product of its (nonzero) digits is 60011280, while the sum is 64.

The spelling of 397057272949 in words is "three hundred ninety-seven billion, fifty-seven million, two hundred seventy-two thousand, nine hundred forty-nine".