72511723 has 2 divisors, whose sum is σ = 72511724. Its totient is φ = 72511722.

The previous prime is 72511711. The next prime is 72511727. The reversal of 72511723 is 32711527.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72511723 - 2¹³ = 72503531 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72511691 and 72511700.

It is not a weakly prime, because it can be changed into another prime (72511727) 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, 36255861 + 36255862.

It is an arithmetic number, because the mean of its divisors is an integer number (36255862).

Almost surely, 2^72511723 is an apocalyptic number.

72511723 is a deficient number, since it is larger than the sum of its proper divisors (1).

72511723 is an equidigital number, since it uses as much as digits as its factorization.

72511723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2940, while the sum is 28.

The square root of 72511723 is about 8515.3815534009. The cubic root of 72511723 is about 417.0000191693. Note that the first 4 decimals are identical.

The spelling of 72511723 in words is "seventy-two million, five hundred eleven thousand, seven hundred twenty-three".