72856037 has 2 divisors, whose sum is σ = 72856038. Its totient is φ = 72856036.

The previous prime is 72856031. The next prime is 72856039. The reversal of 72856037 is 73065827.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61559716 + 11296321 = 7846^2 + 3361^2 .

It is a cyclic number.

It is not a de Polignac number, because 72856037 - 2¹² = 72851941 is a prime.

Together with 72856039, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72856031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36428018 + 36428019.

It is an arithmetic number, because the mean of its divisors is an integer number (36428019).

Almost surely, 2^72856037 is an apocalyptic number.

It is an amenable number.

72856037 is a deficient number, since it is larger than the sum of its proper divisors (1).

72856037 is an equidigital number, since it uses as much as digits as its factorization.

72856037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 72856037 is about 8535.5747902529. The cubic root of 72856037 is about 417.6590035834.

It can be divided in two parts, 728 and 56037, that added together give a palindrome (56765).

The spelling of 72856037 in words is "seventy-two million, eight hundred fifty-six thousand, thirty-seven".