72497879 has 2 divisors, whose sum is σ = 72497880. Its totient is φ = 72497878.

The previous prime is 72497857. The next prime is 72497903. The reversal of 72497879 is 97879427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72497879 - 2¹² = 72493783 is a prime.

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 72497879.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72497849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36248939 + 36248940.

It is an arithmetic number, because the mean of its divisors is an integer number (36248940).

Almost surely, 2^72497879 is an apocalyptic number.

72497879 is a deficient number, since it is larger than the sum of its proper divisors (1).

72497879 is an equidigital number, since it uses as much as digits as its factorization.

72497879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 53.

The square root of 72497879 is about 8514.5686326437. The cubic root of 72497879 is about 416.9734794805.

The spelling of 72497879 in words is "seventy-two million, four hundred ninety-seven thousand, eight hundred seventy-nine".