397658979307 has 4 divisors (see below), whose sum is σ = 397862804416. Its totient is φ = 397455154200.

The previous prime is 397658979281. The next prime is 397658979323. The reversal of 397658979307 is 703979856793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 703979856793 = 24533 ⋅28695221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397658979307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397658979307.

It is not an unprimeable number, because it can be changed into a prime (397658979007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101909628 + ... + 101913529.

It is an arithmetic number, because the mean of its divisors is an integer number (99465701104).

Almost surely, 2^397658979307 is an apocalyptic number.

397658979307 is a deficient number, since it is larger than the sum of its proper divisors (203825109).

397658979307 is a wasteful number, since it uses less digits than its factorization.

397658979307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203825108.

The product of its (nonzero) digits is 540101520, while the sum is 73.

The spelling of 397658979307 in words is "three hundred ninety-seven billion, six hundred fifty-eight million, nine hundred seventy-nine thousand, three hundred seven".