72409153 has 2 divisors, whose sum is σ = 72409154. Its totient is φ = 72409152.

The previous prime is 72409097. The next prime is 72409159. The reversal of 72409153 is 35190427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61340224 + 11068929 = 7832^2 + 3327^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72409153 is a prime.

It is not a weakly prime, because it can be changed into another prime (72409159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36204576 + 36204577.

It is an arithmetic number, because the mean of its divisors is an integer number (36204577).

Almost surely, 2^72409153 is an apocalyptic number.

It is an amenable number.

72409153 is a deficient number, since it is larger than the sum of its proper divisors (1).

72409153 is an equidigital number, since it uses as much as digits as its factorization.

72409153 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 72409153 is about 8509.3567912034. The cubic root of 72409153 is about 416.8033067237.

The spelling of 72409153 in words is "seventy-two million, four hundred nine thousand, one hundred fifty-three".