10638979 has 4 divisors (see below), whose sum is σ = 11457376. Its totient is φ = 9820584.

The previous prime is 10638977. The next prime is 10638989. The reversal of 10638979 is 97983601.

10638979 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97983601 = 59 ⋅1660739.

It is a cyclic number.

It is not a de Polignac number, because 10638979 - 2¹ = 10638977 is a prime.

It is a super-2 number, since 2×10638979² = 226375748324882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10638977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 409179 + ... + 409204.

It is an arithmetic number, because the mean of its divisors is an integer number (2864344).

Almost surely, 2^10638979 is an apocalyptic number.

10638979 is a deficient number, since it is larger than the sum of its proper divisors (818397).

10638979 is an equidigital number, since it uses as much as digits as its factorization.

10638979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818396.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 10638979 is about 3261.7447784890. The cubic root of 10638979 is about 219.9378543476.

The spelling of 10638979 in words is "ten million, six hundred thirty-eight thousand, nine hundred seventy-nine".