72423751 has 2 divisors, whose sum is σ = 72423752. Its totient is φ = 72423750.

The previous prime is 72423749. The next prime is 72423773. The reversal of 72423751 is 15732427.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72423751 - 2¹ = 72423749 is a prime.

Together with 72423749, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72423721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36211875 + 36211876.

It is an arithmetic number, because the mean of its divisors is an integer number (36211876).

Almost surely, 2^72423751 is an apocalyptic number.

72423751 is a deficient number, since it is larger than the sum of its proper divisors (1).

72423751 is an equidigital number, since it uses as much as digits as its factorization.

72423751 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 31.

The square root of 72423751 is about 8510.2145096349. The cubic root of 72423751 is about 416.8313146277.

The spelling of 72423751 in words is "seventy-two million, four hundred twenty-three thousand, seven hundred fifty-one".