36715721 has 4 divisors (see below), whose sum is σ = 41960832. Its totient is φ = 31470612.

The previous prime is 36715703. The next prime is 36715747. The reversal of 36715721 is 12751763.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12751763 = 3301 ⋅3863.

It is a cyclic number.

It is not a de Polignac number, because 36715721 - 2¹⁴ = 36699337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36795721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2622545 + ... + 2622558.

It is an arithmetic number, because the mean of its divisors is an integer number (10490208).

Almost surely, 2^36715721 is an apocalyptic number.

It is an amenable number.

36715721 is a deficient number, since it is larger than the sum of its proper divisors (5245111).

36715721 is an equidigital number, since it uses as much as digits as its factorization.

36715721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5245110.

The product of its digits is 8820, while the sum is 32.

The square root of 36715721 is about 6059.3498826194. The cubic root of 36715721 is about 332.3665841207.

The spelling of 36715721 in words is "thirty-six million, seven hundred fifteen thousand, seven hundred twenty-one".