109661279 has 16 divisors (see below), whose sum is σ = 136012800. Its totient is φ = 86093280.

The previous prime is 109661231. The next prime is 109661281. The reversal of 109661279 is 972166901.

It is not a de Polignac number, because 109661279 - 2²⁰ = 108612703 is a prime.

It is a super-2 number, since 2×109661279² = 24051192223831682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109661219) 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, 7322 + ... + 16520.

It is an arithmetic number, because the mean of its divisors is an integer number (8500800).

Almost surely, 2^109661279 is an apocalyptic number.

109661279 is a deficient number, since it is larger than the sum of its proper divisors (26351521).

109661279 is a wasteful number, since it uses less digits than its factorization.

109661279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9350.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 109661279 is about 10471.9281414647. The cubic root of 109661279 is about 478.6496756378.

The spelling of 109661279 in words is "one hundred nine million, six hundred sixty-one thousand, two hundred seventy-nine".