5000000391 has 6 divisors (see below), whose sum is σ = 7222222800. Its totient is φ = 3333333588.

The previous prime is 5000000353. The next prime is 5000000393. The reversal of 5000000391 is 1930000005.

It is not a de Polignac number, because 5000000391 - 2⁷ = 5000000263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5000000393) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 277777791 + ... + 277777808.

It is an arithmetic number, because the mean of its divisors is an integer number (1203703800).

Almost surely, 2^5000000391 is an apocalyptic number.

5000000391 is a deficient number, since it is larger than the sum of its proper divisors (2222222409).

5000000391 is a wasteful number, since it uses less digits than its factorization.

5000000391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555555605 (or 555555602 counting only the distinct ones).

The product of its (nonzero) digits is 135, while the sum is 18.

The square root of 5000000391 is about 70710.6808834422. The cubic root of 5000000391 is about 1709.9759912501.

Adding to 5000000391 its reverse (1930000005), we get a palindrome (6930000396).

The spelling of 5000000391 in words is "five billion, three hundred ninety-one", and thus it is an aban number.