72545723 has 2 divisors, whose sum is σ = 72545724. Its totient is φ = 72545722.

The previous prime is 72545717. The next prime is 72545731. The reversal of 72545723 is 32754527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72545723 - 2⁸ = 72545467 is a prime.

It is equal to p_4258970 and since 72545723 and 4258970 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (72545023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36272861 + 36272862.

It is an arithmetic number, because the mean of its divisors is an integer number (36272862).

Almost surely, 2^72545723 is an apocalyptic number.

72545723 is a deficient number, since it is larger than the sum of its proper divisors (1).

72545723 is an equidigital number, since it uses as much as digits as its factorization.

72545723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58800, while the sum is 35.

The square root of 72545723 is about 8517.3777067828. The cubic root of 72545723 is about 417.0651846564.

The spelling of 72545723 in words is "seventy-two million, five hundred forty-five thousand, seven hundred twenty-three".