72901723 has 2 divisors, whose sum is σ = 72901724. Its totient is φ = 72901722.

The previous prime is 72901687. The next prime is 72901783. The reversal of 72901723 is 32710927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72901723 - 2¹⁷ = 72770651 is a prime.

It is a super-2 number, since 2×72901723² = 10629322432737458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72901783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36450861 + 36450862.

It is an arithmetic number, because the mean of its divisors is an integer number (36450862).

Almost surely, 2^72901723 is an apocalyptic number.

72901723 is a deficient number, since it is larger than the sum of its proper divisors (1).

72901723 is an equidigital number, since it uses as much as digits as its factorization.

72901723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 72901723 is about 8538.2505819401. The cubic root of 72901723 is about 417.7462861340.

The spelling of 72901723 in words is "seventy-two million, nine hundred one thousand, seven hundred twenty-three".