72865547 has 2 divisors, whose sum is σ = 72865548. Its totient is φ = 72865546.

The previous prime is 72865523. The next prime is 72865577. The reversal of 72865547 is 74556827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72865547 - 2⁶ = 72865483 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 72865498 and 72865507.

It is not a weakly prime, because it can be changed into another prime (72865577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36432773 + 36432774.

It is an arithmetic number, because the mean of its divisors is an integer number (36432774).

Almost surely, 2^72865547 is an apocalyptic number.

72865547 is a deficient number, since it is larger than the sum of its proper divisors (1).

72865547 is an equidigital number, since it uses as much as digits as its factorization.

72865547 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 470400, while the sum is 44.

The square root of 72865547 is about 8536.1318523087. The cubic root of 72865547 is about 417.6771753300.

The spelling of 72865547 in words is "seventy-two million, eight hundred sixty-five thousand, five hundred forty-seven".