72256837 has 2 divisors, whose sum is σ = 72256838. Its totient is φ = 72256836.

The previous prime is 72256763. The next prime is 72256841. The reversal of 72256837 is 73865227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71927361 + 329476 = 8481^2 + 574^2 .

It is a cyclic number.

It is not a de Polignac number, because 72256837 - 2¹¹ = 72254789 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72256837.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72256337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36128418 + 36128419.

It is an arithmetic number, because the mean of its divisors is an integer number (36128419).

Almost surely, 2^72256837 is an apocalyptic number.

It is an amenable number.

72256837 is a deficient number, since it is larger than the sum of its proper divisors (1).

72256837 is an equidigital number, since it uses as much as digits as its factorization.

72256837 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 72256837 is about 8500.4021669566. The cubic root of 72256837 is about 416.5108465533.

The spelling of 72256837 in words is "seventy-two million, two hundred fifty-six thousand, eight hundred thirty-seven".