79200121 has 48 divisors (see below), whose sum is σ = 110315520. Its totient is φ = 55883520.

The previous prime is 79200119. The next prime is 79200157. The reversal of 79200121 is 12100297.

It is not a de Polignac number, because 79200121 - 2¹ = 79200119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79200092 and 79200101.

It is not an unprimeable number, because it can be changed into a prime (79200101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 623560 + ... + 623686.

It is an arithmetic number, because the mean of its divisors is an integer number (2298240).

Almost surely, 2^79200121 is an apocalyptic number.

It is an amenable number.

79200121 is a deficient number, since it is larger than the sum of its proper divisors (31115399).

79200121 is a wasteful number, since it uses less digits than its factorization.

79200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 79200121 is about 8899.4449826941. Note that the first 3 decimals coincide. The cubic root of 79200121 is about 429.4460525029.

The spelling of 79200121 in words is "seventy-nine million, two hundred thousand, one hundred twenty-one".