39244813 has 4 divisors (see below), whose sum is σ = 39448348. Its totient is φ = 39041280.

The previous prime is 39244783. The next prime is 39244837. The reversal of 39244813 is 31844293.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31844293 = 13 ⋅2449561.

It can be written as a sum of positive squares in 2 ways, for example, as 27008809 + 12236004 = 5197^2 + 3498^2 .

It is a cyclic number.

It is not a de Polignac number, because 39244813 - 2⁹ = 39244301 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 (39244613) 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, 101478 + ... + 101863.

It is an arithmetic number, because the mean of its divisors is an integer number (9862087).

Almost surely, 2^39244813 is an apocalyptic number.

It is an amenable number.

39244813 is a deficient number, since it is larger than the sum of its proper divisors (203535).

39244813 is a wasteful number, since it uses less digits than its factorization.

39244813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203534.

The product of its digits is 20736, while the sum is 34.

The square root of 39244813 is about 6264.5680617262. The cubic root of 39244813 is about 339.8292481709.

The spelling of 39244813 in words is "thirty-nine million, two hundred forty-four thousand, eight hundred thirteen".