7792918121 has 4 divisors (see below), whose sum is σ = 8131740672. Its totient is φ = 7454095572.

The previous prime is 7792918117. The next prime is 7792918127. The reversal of 7792918121 is 1218192977.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1218192977 = 557 ⋅2187061.

It is a cyclic number.

It is not a de Polignac number, because 7792918121 - 2² = 7792918117 is a prime.

It is a super-2 number, since 2×7792918121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7792918127) 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, 169411241 + ... + 169411286.

It is an arithmetic number, because the mean of its divisors is an integer number (2032935168).

Almost surely, 2^7792918121 is an apocalyptic number.

It is an amenable number.

7792918121 is a deficient number, since it is larger than the sum of its proper divisors (338822551).

7792918121 is a wasteful number, since it uses less digits than its factorization.

7792918121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338822550.

The product of its digits is 127008, while the sum is 47.

The square root of 7792918121 is about 88277.5063138963. The cubic root of 7792918121 is about 1982.5920988389.

The spelling of 7792918121 in words is "seven billion, seven hundred ninety-two million, nine hundred eighteen thousand, one hundred twenty-one".