79216537 has 2 divisors, whose sum is σ = 79216538. Its totient is φ = 79216536.

The previous prime is 79216499. The next prime is 79216561. The reversal of 79216537 is 73561297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79192201 + 24336 = 8899^2 + 156^2 .

It is a cyclic number.

It is not a de Polignac number, because 79216537 - 2¹⁹ = 78692249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79216537.

It is not a weakly prime, because it can be changed into another prime (79216037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39608268 + 39608269.

It is an arithmetic number, because the mean of its divisors is an integer number (39608269).

Almost surely, 2^79216537 is an apocalyptic number.

It is an amenable number.

79216537 is a deficient number, since it is larger than the sum of its proper divisors (1).

79216537 is an equidigital number, since it uses as much as digits as its factorization.

79216537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79380, while the sum is 40.

The square root of 79216537 is about 8900.3672396143. The cubic root of 79216537 is about 429.4757212260.

The spelling of 79216537 in words is "seventy-nine million, two hundred sixteen thousand, five hundred thirty-seven".