79742519 has 2 divisors, whose sum is σ = 79742520. Its totient is φ = 79742518.

The previous prime is 79742491. The next prime is 79742527. The reversal of 79742519 is 91524797.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79742519 - 2¹² = 79738423 is a prime.

It is a super-2 number, since 2×79742519² = 12717738672930722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79742519.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79742539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39871259 + 39871260.

It is an arithmetic number, because the mean of its divisors is an integer number (39871260).

Almost surely, 2^79742519 is an apocalyptic number.

79742519 is a deficient number, since it is larger than the sum of its proper divisors (1).

79742519 is an equidigital number, since it uses as much as digits as its factorization.

79742519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 158760, while the sum is 44.

The square root of 79742519 is about 8929.8666843352. The cubic root of 79742519 is about 430.4241695100.

The spelling of 79742519 in words is "seventy-nine million, seven hundred forty-two thousand, five hundred nineteen".