72704423 has 12 divisors (see below), whose sum is σ = 81019344. Its totient is φ = 65181600.

The previous prime is 72704407. The next prime is 72704459. The reversal of 72704423 is 32440727.

It is not a de Polignac number, because 72704423 - 2⁴ = 72704407 is a prime.

It is a super-3 number, since 3×72704423³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72704473) 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 in 11 ways as a sum of consecutive naturals, for example, 4718 + ... + 12948.

It is an arithmetic number, because the mean of its divisors is an integer number (6751612).

Almost surely, 2^72704423 is an apocalyptic number.

72704423 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

72704423 is a deficient number, since it is larger than the sum of its proper divisors (8314921).

72704423 is a wasteful number, since it uses less digits than its factorization.

72704423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8326 (or 8315 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 72704423 is about 8526.6888649698. The cubic root of 72704423 is about 417.3690851323.

The spelling of 72704423 in words is "seventy-two million, seven hundred four thousand, four hundred twenty-three".