397039772647 has 36 divisors (see below), whose sum is σ = 480402642096. Its totient is φ = 327166492800.

The previous prime is 397039772627. The next prime is 397039772659. The reversal of 397039772647 is 746277930793.

It is a de Polignac number, because none of the positive numbers 2^k-397039772647 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 (397039772617) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 9581022 + ... + 9622372.

It is an arithmetic number, because the mean of its divisors is an integer number (13344517836).

Almost surely, 2^397039772647 is an apocalyptic number.

397039772647 is a deficient number, since it is larger than the sum of its proper divisors (83362869449).

397039772647 is a wasteful number, since it uses less digits than its factorization.

397039772647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41656 (or 41620 counting only the distinct ones).

The product of its (nonzero) digits is 84015792, while the sum is 64.

The spelling of 397039772647 in words is "three hundred ninety-seven billion, thirty-nine million, seven hundred seventy-two thousand, six hundred forty-seven".