10979623891 has 4 divisors (see below), whose sum is σ = 11052336784. Its totient is φ = 10906911000.

The previous prime is 10979623883. The next prime is 10979623931. The reversal of 10979623891 is 19832697901.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10979623891 - 2³ = 10979623883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10979623801) 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, 36356220 + ... + 36356521.

It is an arithmetic number, because the mean of its divisors is an integer number (2763084196).

Almost surely, 2^10979623891 is an apocalyptic number.

10979623891 is a deficient number, since it is larger than the sum of its proper divisors (72712893).

10979623891 is an equidigital number, since it uses as much as digits as its factorization.

10979623891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72712892.

The product of its (nonzero) digits is 1469664, while the sum is 55.

The spelling of 10979623891 in words is "ten billion, nine hundred seventy-nine million, six hundred twenty-three thousand, eight hundred ninety-one".