397778085923 has 16 divisors (see below), whose sum is σ = 420339375456. Its totient is φ = 375937873920.

The previous prime is 397778085911. The next prime is 397778085941. The reversal of 397778085923 is 329580877793.

It is a cyclic number.

It is not a de Polignac number, because 397778085923 - 2⁴ = 397778085907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397778085953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402686 + ... + 978627.

It is an arithmetic number, because the mean of its divisors is an integer number (26271210966).

Almost surely, 2^397778085923 is an apocalyptic number.

397778085923 is a deficient number, since it is larger than the sum of its proper divisors (22561289533).

397778085923 is a wasteful number, since it uses less digits than its factorization.

397778085923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381574.

The product of its (nonzero) digits is 160030080, while the sum is 68.

The spelling of 397778085923 in words is "three hundred ninety-seven billion, seven hundred seventy-eight million, eighty-five thousand, nine hundred twenty-three".