397081276639 has 8 divisors (see below), whose sum is σ = 405222238800. Its totient is φ = 389013327936.

The previous prime is 397081276607. The next prime is 397081276643. The reversal of 397081276639 is 936672180793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 397081276639 - 2⁵ = 397081276607 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 (397081376639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18242377 + ... + 18264130.

It is an arithmetic number, because the mean of its divisors is an integer number (50652779850).

Almost surely, 2^397081276639 is an apocalyptic number.

397081276639 is a deficient number, since it is larger than the sum of its proper divisors (8140962161).

397081276639 is a wasteful number, since it uses less digits than its factorization.

397081276639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36506729.

The product of its (nonzero) digits is 20575296, while the sum is 61.

The spelling of 397081276639 in words is "three hundred ninety-seven billion, eighty-one million, two hundred seventy-six thousand, six hundred thirty-nine".