1089979631 has 16 divisors (see below), whose sum is σ = 1239903840. Its totient is φ = 949864320.

The previous prime is 1089979573. The next prime is 1089979663. The reversal of 1089979631 is 1369799801.

It is a cyclic number.

It is not a de Polignac number, because 1089979631 - 2²⁶ = 1022870767 is a prime.

It is a super-2 number, since 2×1089979631² = 2376111191989792322, 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 (1089979691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64841 + ... + 79901.

It is an arithmetic number, because the mean of its divisors is an integer number (77493990).

Almost surely, 2^1089979631 is an apocalyptic number.

1089979631 is a deficient number, since it is larger than the sum of its proper divisors (149924209).

1089979631 is a wasteful number, since it uses less digits than its factorization.

1089979631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15386.

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 1089979631 is about 33014.8395573869. The cubic root of 1089979631 is about 1029.1360559496.

The spelling of 1089979631 in words is "one billion, eighty-nine million, nine hundred seventy-nine thousand, six hundred thirty-one".