36720609 has 4 divisors (see below), whose sum is σ = 48960816. Its totient is φ = 24480404.

The previous prime is 36720571. The next prime is 36720617. The reversal of 36720609 is 90602763.

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.

It is a cyclic number.

It is not a de Polignac number, because 36720609 - 2¹⁷ = 36589537 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 36720609.

It is not an unprimeable number, because it can be changed into a prime (36720659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6120099 + ... + 6120104.

It is an arithmetic number, because the mean of its divisors is an integer number (12240204).

Almost surely, 2^36720609 is an apocalyptic number.

It is an amenable number.

36720609 is a deficient number, since it is larger than the sum of its proper divisors (12240207).

36720609 is a wasteful number, since it uses less digits than its factorization.

36720609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12240206.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 36720609 is about 6059.7532127967. The cubic root of 36720609 is about 332.3813328961.

The spelling of 36720609 in words is "thirty-six million, seven hundred twenty thousand, six hundred nine".