36399709 has 4 divisors (see below), whose sum is σ = 36516316. Its totient is φ = 36283104.

The previous prime is 36399691. The next prime is 36399721. The reversal of 36399709 is 90799363.

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 459684 + 35940025 = 678^2 + 5995^2 .

It is a cyclic number.

It is not a de Polignac number, because 36399709 - 2¹⁷ = 36268637 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 (36399809) 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, 57834 + ... + 58459.

It is an arithmetic number, because the mean of its divisors is an integer number (9129079).

Almost surely, 2^36399709 is an apocalyptic number.

It is an amenable number.

36399709 is a deficient number, since it is larger than the sum of its proper divisors (116607).

36399709 is a wasteful number, since it uses less digits than its factorization.

36399709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116606.

The product of its (nonzero) digits is 275562, while the sum is 46.

The square root of 36399709 is about 6033.2171351610. The cubic root of 36399709 is about 331.4102761102.

The spelling of 36399709 in words is "thirty-six million, three hundred ninety-nine thousand, seven hundred nine".