72915461 has 2 divisors, whose sum is σ = 72915462. Its totient is φ = 72915460.

The previous prime is 72915443. The next prime is 72915463. The reversal of 72915461 is 16451927.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50495236 + 22420225 = 7106^2 + 4735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72915461 is a prime.

Together with 72915463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72915463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36457730 + 36457731.

It is an arithmetic number, because the mean of its divisors is an integer number (36457731).

Almost surely, 2^72915461 is an apocalyptic number.

It is an amenable number.

72915461 is a deficient number, since it is larger than the sum of its proper divisors (1).

72915461 is an equidigital number, since it uses as much as digits as its factorization.

72915461 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 72915461 is about 8539.0550413966. The cubic root of 72915461 is about 417.7725252853.

The spelling of 72915461 in words is "seventy-two million, nine hundred fifteen thousand, four hundred sixty-one".