971913979 has 4 divisors (see below), whose sum is σ = 995619240. Its totient is φ = 948208720.

The previous prime is 971913961. The next prime is 971913983. The reversal of 971913979 is 979319179.

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 971913979 - 2¹¹ = 971911931 is a prime.

It is a super-2 number, since 2×971913979² = 1889233565151224882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (971913079) 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, 11852569 + ... + 11852650.

It is an arithmetic number, because the mean of its divisors is an integer number (248904810).

Almost surely, 2^971913979 is an apocalyptic number.

971913979 is a deficient number, since it is larger than the sum of its proper divisors (23705261).

971913979 is a wasteful number, since it uses less digits than its factorization.

971913979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23705260.

The product of its digits is 964467, while the sum is 55.

The square root of 971913979 is about 31175.5349432853. The cubic root of 971913979 is about 990.5489520899.

The spelling of 971913979 in words is "nine hundred seventy-one million, nine hundred thirteen thousand, nine hundred seventy-nine".