79121722 has 4 divisors (see below), whose sum is σ = 118682586. Its totient is φ = 39560860.

The previous prime is 79121663. The next prime is 79121737. The reversal of 79121722 is 22712197.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22712197 = 2287 ⋅9931.

It can be written as a sum of positive squares in only one way, i.e., 78163281 + 958441 = 8841^2 + 979^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19780429 + ... + 19780432.

Almost surely, 2^79121722 is an apocalyptic number.

79121722 is a deficient number, since it is larger than the sum of its proper divisors (39560864).

79121722 is a wasteful number, since it uses less digits than its factorization.

79121722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39560863.

The product of its digits is 3528, while the sum is 31.

The square root of 79121722 is about 8895.0391792279. The cubic root of 79121722 is about 429.3043050075.

It can be divided in two parts, 79 and 121722, that added together give a square (121801 = 349²).

The spelling of 79121722 in words is "seventy-nine million, one hundred twenty-one thousand, seven hundred twenty-two".