5391639 has 18 divisors (see below), whose sum is σ = 8562008. Its totient is φ = 3267000.

The previous prime is 5391619. The next prime is 5391643. The reversal of 5391639 is 9361935.

It is a de Polignac number, because none of the positive numbers 2^k-5391639 is a prime.

It is a super-2 number, since 2×5391639² = 58139542212642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5391619) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1387 + ... + 3564.

Almost surely, 2^5391639 is an apocalyptic number.

5391639 is a deficient number, since it is larger than the sum of its proper divisors (3170369).

5391639 is a wasteful number, since it uses less digits than its factorization.

5391639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4979 (or 4965 counting only the distinct ones).

The product of its digits is 21870, while the sum is 36.

The square root of 5391639 is about 2321.9903100573. The cubic root of 5391639 is about 175.3504704375.

The spelling of 5391639 in words is "five million, three hundred ninety-one thousand, six hundred thirty-nine".