79404903961 has 4 divisors (see below), whose sum is σ = 79446027024. Its totient is φ = 79363780900.

The previous prime is 79404903869. The next prime is 79404903983. The reversal of 79404903961 is 16930940497.

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 a cyclic number.

It is not a de Polignac number, because 79404903961 - 2¹¹ = 79404901913 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 79404903899 and 79404903908.

It is not an unprimeable number, because it can be changed into a prime (79404933961) 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, 20558635 + ... + 20562496.

It is an arithmetic number, because the mean of its divisors is an integer number (19861506756).

Almost surely, 2^79404903961 is an apocalyptic number.

It is an amenable number.

79404903961 is a deficient number, since it is larger than the sum of its proper divisors (41123063).

79404903961 is a wasteful number, since it uses less digits than its factorization.

79404903961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41123062.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The spelling of 79404903961 in words is "seventy-nine billion, four hundred four million, nine hundred three thousand, nine hundred sixty-one".