72703751 has 2 divisors, whose sum is σ = 72703752. Its totient is φ = 72703750.

The previous prime is 72703733. The next prime is 72703789. The reversal of 72703751 is 15730727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72703751 - 2¹⁴ = 72687367 is a prime.

It is equal to p_4267643 and since 72703751 and 4267643 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72703721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36351875 + 36351876.

It is an arithmetic number, because the mean of its divisors is an integer number (36351876).

Almost surely, 2^72703751 is an apocalyptic number.

72703751 is a deficient number, since it is larger than the sum of its proper divisors (1).

72703751 is an equidigital number, since it uses as much as digits as its factorization.

72703751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 72703751 is about 8526.6494591956. The cubic root of 72703751 is about 417.3677992275.

The spelling of 72703751 in words is "seventy-two million, seven hundred three thousand, seven hundred fifty-one".