79862749321 has 2 divisors, whose sum is σ = 79862749322. Its totient is φ = 79862749320.

The previous prime is 79862749313. The next prime is 79862749367. The reversal of 79862749321 is 12394726897.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79544305296 + 318444025 = 282036^2 + 17845^2 .

It is a cyclic number.

It is not a de Polignac number, because 79862749321 - 2³ = 79862749313 is a prime.

It is a super-2 number, since 2×79862749321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (79862749921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39931374660 + 39931374661.

It is an arithmetic number, because the mean of its divisors is an integer number (39931374661).

Almost surely, 2^79862749321 is an apocalyptic number.

It is an amenable number.

79862749321 is a deficient number, since it is larger than the sum of its proper divisors (1).

79862749321 is an equidigital number, since it uses as much as digits as its factorization.

79862749321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 58.

The spelling of 79862749321 in words is "seventy-nine billion, eight hundred sixty-two million, seven hundred forty-nine thousand, three hundred twenty-one".