7919717961 has 4 divisors (see below), whose sum is σ = 10559623952. Its totient is φ = 5279811972.

The previous prime is 7919717957. The next prime is 7919717977. The reversal of 7919717961 is 1697179197.

7919717961 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7919717961 - 2² = 7919717957 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7919715961) 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, 1319952991 + ... + 1319952996.

It is an arithmetic number, because the mean of its divisors is an integer number (2639905988).

Almost surely, 2^7919717961 is an apocalyptic number.

It is an amenable number.

7919717961 is a deficient number, since it is larger than the sum of its proper divisors (2639905991).

7919717961 is a wasteful number, since it uses less digits than its factorization.

7919717961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2639905990.

The product of its digits is 1500282, while the sum is 57.

The square root of 7919717961 is about 88992.7972422488. The cubic root of 7919717961 is about 1993.2873252885.

The spelling of 7919717961 in words is "seven billion, nine hundred nineteen million, seven hundred seventeen thousand, nine hundred sixty-one".