72336637 has 2 divisors, whose sum is σ = 72336638. Its totient is φ = 72336636.

The previous prime is 72336631. The next prime is 72336689. The reversal of 72336637 is 73663327.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45077796 + 27258841 = 6714^2 + 5221^2 .

It is an emirp because it is prime and its reverse (73663327) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72336637 - 2¹¹ = 72334589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72336596 and 72336605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72336631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36168318 + 36168319.

It is an arithmetic number, because the mean of its divisors is an integer number (36168319).

Almost surely, 2^72336637 is an apocalyptic number.

It is an amenable number.

72336637 is a deficient number, since it is larger than the sum of its proper divisors (1).

72336637 is an equidigital number, since it uses as much as digits as its factorization.

72336637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 95256, while the sum is 37.

The square root of 72336637 is about 8505.0947672557. The cubic root of 72336637 is about 416.6641208022.

The spelling of 72336637 in words is "seventy-two million, three hundred thirty-six thousand, six hundred thirty-seven".