72547807 has 2 divisors, whose sum is σ = 72547808. Its totient is φ = 72547806.

The previous prime is 72547777. The next prime is 72547829. The reversal of 72547807 is 70874527.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72547807 is a prime.

It is a Chen prime.

It is the 8518-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 72547807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72547847) by changing a digit.

It is a nontrivial repunit in base 8517.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36273903 + 36273904.

It is an arithmetic number, because the mean of its divisors is an integer number (36273904).

Almost surely, 2^72547807 is an apocalyptic number.

72547807 is a deficient number, since it is larger than the sum of its proper divisors (1).

72547807 is an equidigital number, since it uses as much as digits as its factorization.

72547807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 72547807 is about 8517.5000440270. The cubic root of 72547807 is about 417.0691782552.

The spelling of 72547807 in words is "seventy-two million, five hundred forty-seven thousand, eight hundred seven".