791388387 has 20 divisors (see below), whose sum is σ = 1183021840. Its totient is φ = 527224464.

The previous prime is 791388379. The next prime is 791388391. The reversal of 791388387 is 783883197.

It is not a de Polignac number, because 791388387 - 2³ = 791388379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (791388307) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 163914 + ... + 168672.

It is an arithmetic number, because the mean of its divisors is an integer number (59151092).

Almost surely, 2^791388387 is an apocalyptic number.

791388387 is a deficient number, since it is larger than the sum of its proper divisors (391633453).

791388387 is a wasteful number, since it uses less digits than its factorization.

791388387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6824 (or 6815 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 791388387 is about 28131.6260994632. The cubic root of 791388387 is about 924.9747787620.

The spelling of 791388387 in words is "seven hundred ninety-one million, three hundred eighty-eight thousand, three hundred eighty-seven".