10639791 has 24 divisors (see below), whose sum is σ = 16565120. Its totient is φ = 6559056.

The previous prime is 10639763. The next prime is 10639793. The reversal of 10639791 is 19793601.

10639791 is a `hidden beast` number, since 10 + 639 + 7 + 9 + 1 = 666.

It is not a de Polignac number, because 10639791 - 2⁷ = 10639663 is a prime.

It is a super-2 number, since 2×10639791² = 226410305047362, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10639793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6630 + ... + 8076.

Almost surely, 2^10639791 is an apocalyptic number.

10639791 is a deficient number, since it is larger than the sum of its proper divisors (5925329).

10639791 is a wasteful number, since it uses less digits than its factorization.

10639791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515 (or 1512 counting only the distinct ones).

The product of its (nonzero) digits is 10206, while the sum is 36.

The square root of 10639791 is about 3261.8692493722. The cubic root of 10639791 is about 219.9434496525.

The spelling of 10639791 in words is "ten million, six hundred thirty-nine thousand, seven hundred ninety-one".