72914561 has 2 divisors, whose sum is σ = 72914562. Its totient is φ = 72914560.

The previous prime is 72914557. The next prime is 72914579. The reversal of 72914561 is 16541927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43970161 + 28944400 = 6631^2 + 5380^2 .

It is a cyclic number.

It is not a de Polignac number, because 72914561 - 2² = 72914557 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72914461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36457280 + 36457281.

It is an arithmetic number, because the mean of its divisors is an integer number (36457281).

Almost surely, 2^72914561 is an apocalyptic number.

It is an amenable number.

72914561 is a deficient number, since it is larger than the sum of its proper divisors (1).

72914561 is an equidigital number, since it uses as much as digits as its factorization.

72914561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 35.

The square root of 72914561 is about 8539.0023421943. The cubic root of 72914561 is about 417.7708064143.

The spelling of 72914561 in words is "seventy-two million, nine hundred fourteen thousand, five hundred sixty-one".