79917451 has 2 divisors, whose sum is σ = 79917452. Its totient is φ = 79917450.

The previous prime is 79917413. The next prime is 79917499. The reversal of 79917451 is 15471997.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 79917451 - 2¹¹ = 79915403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79917398 and 79917407.

It is not a weakly prime, because it can be changed into another prime (79917251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39958725 + 39958726.

It is an arithmetic number, because the mean of its divisors is an integer number (39958726).

Almost surely, 2^79917451 is an apocalyptic number.

79917451 is a deficient number, since it is larger than the sum of its proper divisors (1).

79917451 is an equidigital number, since it uses as much as digits as its factorization.

79917451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 79380, while the sum is 43.

The square root of 79917451 is about 8939.6560895820. The cubic root of 79917451 is about 430.7386816436.

The spelling of 79917451 in words is "seventy-nine million, nine hundred seventeen thousand, four hundred fifty-one".