79222021937 has 2 divisors, whose sum is σ = 79222021938. Its totient is φ = 79222021936.

The previous prime is 79222021927. The next prime is 79222022057. The reversal of 79222021937 is 73912022297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78511479601 + 710542336 = 280199^2 + 26656^2 .

It is an emirp because it is prime and its reverse (73912022297) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79222021937 - 2⁶ = 79222021873 is a prime.

It is a super-2 number, since 2×79222021937² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79222021927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39611010968 + 39611010969.

It is an arithmetic number, because the mean of its divisors is an integer number (39611010969).

Almost surely, 2^79222021937 is an apocalyptic number.

It is an amenable number.

79222021937 is a deficient number, since it is larger than the sum of its proper divisors (1).

79222021937 is an equidigital number, since it uses as much as digits as its factorization.

79222021937 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 79222021937 in words is "seventy-nine billion, two hundred twenty-two million, twenty-one thousand, nine hundred thirty-seven".