36620509 has 4 divisors (see below), whose sum is σ = 37311516. Its totient is φ = 35929504.

The previous prime is 36620497. The next prime is 36620537. The reversal of 36620509 is 90502663.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18896409 + 17724100 = 4347^2 + 4210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36620509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36620539) 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, 345424 + ... + 345529.

It is an arithmetic number, because the mean of its divisors is an integer number (9327879).

Almost surely, 2^36620509 is an apocalyptic number.

It is an amenable number.

36620509 is a deficient number, since it is larger than the sum of its proper divisors (691007).

36620509 is an equidigital number, since it uses as much as digits as its factorization.

36620509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691006.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 36620509 is about 6051.4881640800. The cubic root of 36620509 is about 332.0790353520.

The spelling of 36620509 in words is "thirty-six million, six hundred twenty thousand, five hundred nine".