72649567 has 2 divisors, whose sum is σ = 72649568. Its totient is φ = 72649566.

The previous prime is 72649561. The next prime is 72649607. The reversal of 72649567 is 76594627.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72649567 - 2⁷ = 72649439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72649561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36324783 + 36324784.

It is an arithmetic number, because the mean of its divisors is an integer number (36324784).

Almost surely, 2^72649567 is an apocalyptic number.

72649567 is a deficient number, since it is larger than the sum of its proper divisors (1).

72649567 is an equidigital number, since it uses as much as digits as its factorization.

72649567 is an evil number, because the sum of its binary digits is even.

The product of its digits is 635040, while the sum is 46.

The square root of 72649567 is about 8523.4715345333. The cubic root of 72649567 is about 417.2640894149.

The spelling of 72649567 in words is "seventy-two million, six hundred forty-nine thousand, five hundred sixty-seven".