72637441 has 2 divisors, whose sum is σ = 72637442. Its totient is φ = 72637440.

The previous prime is 72637429. The next prime is 72637459. The reversal of 72637441 is 14473627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57699216 + 14938225 = 7596^2 + 3865^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72637441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72637397 and 72637406.

It is not a weakly prime, because it can be changed into another prime (72637241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36318720 + 36318721.

It is an arithmetic number, because the mean of its divisors is an integer number (36318721).

Almost surely, 2^72637441 is an apocalyptic number.

It is an amenable number.

72637441 is a deficient number, since it is larger than the sum of its proper divisors (1).

72637441 is an equidigital number, since it uses as much as digits as its factorization.

72637441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 34.

The square root of 72637441 is about 8522.7601749668. The cubic root of 72637441 is about 417.2408728238.

The spelling of 72637441 in words is "seventy-two million, six hundred thirty-seven thousand, four hundred forty-one".