72895561 has 2 divisors, whose sum is σ = 72895562. Its totient is φ = 72895560.

The previous prime is 72895553. The next prime is 72895577. The reversal of 72895561 is 16559827.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71318025 + 1577536 = 8445^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 72895561 - 2³ = 72895553 is a prime.

It is not a weakly prime, because it can be changed into another prime (72895861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36447780 + 36447781.

It is an arithmetic number, because the mean of its divisors is an integer number (36447781).

Almost surely, 2^72895561 is an apocalyptic number.

It is an amenable number.

72895561 is a deficient number, since it is larger than the sum of its proper divisors (1).

72895561 is an equidigital number, since it uses as much as digits as its factorization.

72895561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151200, while the sum is 43.

The square root of 72895561 is about 8537.8897275615. The cubic root of 72895561 is about 417.7345158354.

The spelling of 72895561 in words is "seventy-two million, eight hundred ninety-five thousand, five hundred sixty-one".