10918639 has 6 divisors (see below), whose sum is σ = 11031720. Its totient is φ = 10806696.

The previous prime is 10918637. The next prime is 10918657. The reversal of 10918639 is 93681901.

10918639 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10918639 - 2¹ = 10918637 is a prime.

It is a super-2 number, since 2×10918639² = 238433355224642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10918598 and 10918607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10918631) 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, 11422 + ... + 12340.

It is an arithmetic number, because the mean of its divisors is an integer number (1838620).

Almost surely, 2^10918639 is an apocalyptic number.

10918639 is a deficient number, since it is larger than the sum of its proper divisors (113081).

10918639 is an frugal number, since it uses more digits than its factorization.

10918639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1137 (or 1028 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 10918639 is about 3304.3363932869. The cubic root of 10918639 is about 221.8483326807.

It can be divided in two parts, 1091 and 8639, that added together give a triangular number (9730 = T₁₃₉).

The spelling of 10918639 in words is "ten million, nine hundred eighteen thousand, six hundred thirty-nine".