72556373 has 4 divisors (see below), whose sum is σ = 72975948. Its totient is φ = 72136800.

The previous prime is 72556361. The next prime is 72556381. The reversal of 72556373 is 37365527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 37365527 = 109 ⋅342803.

It can be written as a sum of positive squares in 2 ways, for example, as 65966884 + 6589489 = 8122^2 + 2567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72556373 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 (72556303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209528 + ... + 209873.

It is an arithmetic number, because the mean of its divisors is an integer number (18243987).

Almost surely, 2^72556373 is an apocalyptic number.

It is an amenable number.

72556373 is a deficient number, since it is larger than the sum of its proper divisors (419575).

72556373 is a wasteful number, since it uses less digits than its factorization.

72556373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 419574.

The product of its digits is 132300, while the sum is 38.

The square root of 72556373 is about 8518.0028762615. The cubic root of 72556373 is about 417.0855925992.

The spelling of 72556373 in words is "seventy-two million, five hundred fifty-six thousand, three hundred seventy-three".