79719290381 has 2 divisors, whose sum is σ = 79719290382. Its totient is φ = 79719290380.

The previous prime is 79719290267. The next prime is 79719290401. The reversal of 79719290381 is 18309291797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58276374025 + 21442916356 = 241405^2 + 146434^2 .

It is a cyclic number.

It is not a de Polignac number, because 79719290381 - 2¹⁸ = 79719028237 is a prime.

It is a super-2 number, since 2×79719290381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79719292381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39859645190 + 39859645191.

It is an arithmetic number, because the mean of its divisors is an integer number (39859645191).

Almost surely, 2^79719290381 is an apocalyptic number.

It is an amenable number.

79719290381 is a deficient number, since it is larger than the sum of its proper divisors (1).

79719290381 is an equidigital number, since it uses as much as digits as its factorization.

79719290381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1714608, while the sum is 56.

The spelling of 79719290381 in words is "seventy-nine billion, seven hundred nineteen million, two hundred ninety thousand, three hundred eighty-one".