109779631 has 16 divisors (see below), whose sum is σ = 120355200. Its totient is φ = 99525888.

The previous prime is 109779617. The next prime is 109779643. The reversal of 109779631 is 136977901.

It is a cyclic number.

It is not a de Polignac number, because 109779631 - 2⁵ = 109779599 is a prime.

It is a super-2 number, since 2×109779631² = 24103134764992322, 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 (109779601) 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, 276325 + ... + 276721.

It is an arithmetic number, because the mean of its divisors is an integer number (7522200).

Almost surely, 2^109779631 is an apocalyptic number.

109779631 is a deficient number, since it is larger than the sum of its proper divisors (10575569).

109779631 is a wasteful number, since it uses less digits than its factorization.

109779631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738.

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 109779631 is about 10477.5775349076. The cubic root of 109779631 is about 478.8218080429.

The spelling of 109779631 in words is "one hundred nine million, seven hundred seventy-nine thousand, six hundred thirty-one".