72472549 has 2 divisors, whose sum is σ = 72472550. Its totient is φ = 72472548.

The previous prime is 72472541. The next prime is 72472573. The reversal of 72472549 is 94527427.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61701025 + 10771524 = 7855^2 + 3282^2 .

It is a cyclic number.

It is not a de Polignac number, because 72472549 - 2³ = 72472541 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72472541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36236274 + 36236275.

It is an arithmetic number, because the mean of its divisors is an integer number (36236275).

Almost surely, 2^72472549 is an apocalyptic number.

It is an amenable number.

72472549 is a deficient number, since it is larger than the sum of its proper divisors (1).

72472549 is an equidigital number, since it uses as much as digits as its factorization.

72472549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 40.

The square root of 72472549 is about 8513.0810521221. The cubic root of 72472549 is about 416.9249117674.

The spelling of 72472549 in words is "seventy-two million, four hundred seventy-two thousand, five hundred forty-nine".