31939045 has 8 divisors (see below), whose sum is σ = 38357280. Its totient is φ = 25530960.

The previous prime is 31939031. The next prime is 31939049. The reversal of 31939045 is 54093913.

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

It is not a de Polignac number, because 31939045 - 2¹³ = 31930853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31939045.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31939049) 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, 10330 + ... + 13060.

It is an arithmetic number, because the mean of its divisors is an integer number (4794660).

Almost surely, 2^31939045 is an apocalyptic number.

It is an amenable number.

31939045 is a deficient number, since it is larger than the sum of its proper divisors (6418235).

31939045 is a wasteful number, since it uses less digits than its factorization.

31939045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5075.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 31939045 is about 5651.4639696277. The cubic root of 31939045 is about 317.2784988649.

The spelling of 31939045 in words is "thirty-one million, nine hundred thirty-nine thousand, forty-five".