72293751 has 6 divisors (see below), whose sum is σ = 104424320. Its totient is φ = 48195828.

The previous prime is 72293731. The next prime is 72293777. The reversal of 72293751 is 15739227.

It is not a de Polignac number, because 72293751 - 2⁵ = 72293719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72293731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4016311 + ... + 4016328.

Almost surely, 2^72293751 is an apocalyptic number.

72293751 is a deficient number, since it is larger than the sum of its proper divisors (32130569).

72293751 is a wasteful number, since it uses less digits than its factorization.

72293751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8032645 (or 8032642 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 72293751 is about 8502.5731987440. The cubic root of 72293751 is about 416.5817623980.

The spelling of 72293751 in words is "seventy-two million, two hundred ninety-three thousand, seven hundred fifty-one".