36720637 has 2 divisors, whose sum is σ = 36720638. Its totient is φ = 36720636.

The previous prime is 36720631. The next prime is 36720659. The reversal of 36720637 is 73602763.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35748441 + 972196 = 5979^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 36720637 - 2¹⁵ = 36687869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36720631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18360318 + 18360319.

It is an arithmetic number, because the mean of its divisors is an integer number (18360319).

Almost surely, 2^36720637 is an apocalyptic number.

It is an amenable number.

36720637 is a deficient number, since it is larger than the sum of its proper divisors (1).

36720637 is an equidigital number, since it uses as much as digits as its factorization.

36720637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 34.

The square root of 36720637 is about 6059.7555231214. The cubic root of 36720637 is about 332.3814173780.

The spelling of 36720637 in words is "thirty-six million, seven hundred twenty thousand, six hundred thirty-seven".