72523651 has 2 divisors, whose sum is σ = 72523652. Its totient is φ = 72523650.

The previous prime is 72523631. The next prime is 72523691. The reversal of 72523651 is 15632527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72523651 - 2⁷ = 72523523 is a prime.

It is not a weakly prime, because it can be changed into another prime (72523631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36261825 + 36261826.

It is an arithmetic number, because the mean of its divisors is an integer number (36261826).

Almost surely, 2^72523651 is an apocalyptic number.

72523651 is a deficient number, since it is larger than the sum of its proper divisors (1).

72523651 is an equidigital number, since it uses as much as digits as its factorization.

72523651 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 31.

The square root of 72523651 is about 8516.0819042562. The cubic root of 72523651 is about 417.0228830747.

The spelling of 72523651 in words is "seventy-two million, five hundred twenty-three thousand, six hundred fifty-one".