391396875 has 48 divisors (see below), whose sum is σ = 661457664. Its totient is φ = 205820000.

The previous prime is 391396867. The next prime is 391396877. The reversal of 391396875 is 578693193.

It is not a de Polignac number, because 391396875 - 2³ = 391396867 is a prime.

It is not an unprimeable number, because it can be changed into a prime (391396877) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 777874 + ... + 778376.

It is an arithmetic number, because the mean of its divisors is an integer number (13780368).

Almost surely, 2^391396875 is an apocalyptic number.

391396875 is a deficient number, since it is larger than the sum of its proper divisors (270060789).

391396875 is an frugal number, since it uses more digits than its factorization.

391396875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614 (or 594 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 51.

The square root of 391396875 is about 19783.7528037529. The cubic root of 391396875 is about 731.4856060149.

The spelling of 391396875 in words is "three hundred ninety-one million, three hundred ninety-six thousand, eight hundred seventy-five".