397039772657 has 4 divisors (see below), whose sum is σ = 433134297456. Its totient is φ = 360945247860.

The previous prime is 397039772627. The next prime is 397039772659. The reversal of 397039772657 is 756277930793.

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 not a de Polignac number, because 397039772657 - 2⁸ = 397039772401 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 397039772593 and 397039772602.

It is not an unprimeable number, because it can be changed into a prime (397039772659) 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, 18047262383 + ... + 18047262404.

It is an arithmetic number, because the mean of its divisors is an integer number (108283574364).

Almost surely, 2^397039772657 is an apocalyptic number.

It is an amenable number.

397039772657 is a deficient number, since it is larger than the sum of its proper divisors (36094524799).

397039772657 is a wasteful number, since it uses less digits than its factorization.

397039772657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36094524798.

The product of its (nonzero) digits is 105019740, while the sum is 65.

The spelling of 397039772657 in words is "three hundred ninety-seven billion, thirty-nine million, seven hundred seventy-two thousand, six hundred fifty-seven".