39993545 has 8 divisors (see below), whose sum is σ = 48075720. Its totient is φ = 31939200.

The previous prime is 39993539. The next prime is 39993553. The reversal of 39993545 is 54539993.

It can be written as a sum of positive squares in 4 ways, for example, as 1006009 + 38987536 = 1003^2 + 6244^2 .

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

It is not a de Polignac number, because 39993545 - 2⁴ = 39993529 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39993545.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3650 + ... + 9659.

It is an arithmetic number, because the mean of its divisors is an integer number (6009465).

Almost surely, 2^39993545 is an apocalyptic number.

It is an amenable number.

39993545 is a deficient number, since it is larger than the sum of its proper divisors (8082175).

39993545 is a wasteful number, since it uses less digits than its factorization.

39993545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13915.

The product of its digits is 656100, while the sum is 47.

The square root of 39993545 is about 6324.0449871898. The cubic root of 39993545 is about 341.9767918544.

The spelling of 39993545 in words is "thirty-nine million, nine hundred ninety-three thousand, five hundred forty-five".