79542499 has 2 divisors, whose sum is σ = 79542500. Its totient is φ = 79542498.

The previous prime is 79542481. The next prime is 79542503. The reversal of 79542499 is 99424597.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79542499 - 2¹³ = 79534307 is a prime.

It is not a weakly prime, because it can be changed into another prime (79542299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39771249 + 39771250.

It is an arithmetic number, because the mean of its divisors is an integer number (39771250).

Almost surely, 2^79542499 is an apocalyptic number.

79542499 is a deficient number, since it is larger than the sum of its proper divisors (1).

79542499 is an equidigital number, since it uses as much as digits as its factorization.

79542499 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 79542499 is about 8918.6601572209. The cubic root of 79542499 is about 430.0639872327.

The spelling of 79542499 in words is "seventy-nine million, five hundred forty-two thousand, four hundred ninety-nine".