79750121 has 4 divisors (see below), whose sum is σ = 87000144. Its totient is φ = 72500100.

The previous prime is 79750093. The next prime is 79750127. The reversal of 79750121 is 12105797.

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 79750121 - 2¹⁴ = 79733737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79750127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3624995 + ... + 3625016.

It is an arithmetic number, because the mean of its divisors is an integer number (21750036).

Almost surely, 2^79750121 is an apocalyptic number.

It is an amenable number.

79750121 is a deficient number, since it is larger than the sum of its proper divisors (7250023).

79750121 is a wasteful number, since it uses less digits than its factorization.

79750121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7250022.

The product of its (nonzero) digits is 4410, while the sum is 32.

The square root of 79750121 is about 8930.2923244427. The cubic root of 79750121 is about 430.4378467828.

The spelling of 79750121 in words is "seventy-nine million, seven hundred fifty thousand, one hundred twenty-one".