39199813 has 8 divisors (see below), whose sum is σ = 40516056. Its totient is φ = 37900800.

The previous prime is 39199801. The next prime is 39199819. The reversal of 39199813 is 31899193.

It can be written as a sum of positive squares in 4 ways, for example, as 37249 + 39162564 = 193^2 + 6258^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 39199813 - 2²¹ = 37102661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 39199813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39199819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 403 + ... + 8863.

It is an arithmetic number, because the mean of its divisors is an integer number (5064507).

Almost surely, 2^39199813 is an apocalyptic number.

It is an amenable number.

39199813 is a deficient number, since it is larger than the sum of its proper divisors (1316243).

39199813 is a wasteful number, since it uses less digits than its factorization.

39199813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8615.

The product of its digits is 52488, while the sum is 43.

The square root of 39199813 is about 6260.9754032419. The cubic root of 39199813 is about 339.6993102785.

The spelling of 39199813 in words is "thirty-nine million, one hundred ninety-nine thousand, eight hundred thirteen".