72708907 has 2 divisors, whose sum is σ = 72708908. Its totient is φ = 72708906.

The previous prime is 72708863. The next prime is 72708917. The reversal of 72708907 is 70980727.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72708907 is a prime.

It is equal to p_4267948 and since 72708907 and 4267948 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72708907.

It is not a weakly prime, because it can be changed into another prime (72708917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36354453 + 36354454.

It is an arithmetic number, because the mean of its divisors is an integer number (36354454).

Almost surely, 2^72708907 is an apocalyptic number.

72708907 is a deficient number, since it is larger than the sum of its proper divisors (1).

72708907 is an equidigital number, since it uses as much as digits as its factorization.

72708907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 72708907 is about 8526.9518000280. The cubic root of 72708907 is about 417.3776652820.

The spelling of 72708907 in words is "seventy-two million, seven hundred eight thousand, nine hundred seven".