3131939407 has 4 divisors (see below), whose sum is σ = 3216586456. Its totient is φ = 3047292360.

The previous prime is 3131939389. The next prime is 3131939483. The reversal of 3131939407 is 7049391313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3131939407 - 2¹¹ = 3131937359 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 3131939407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131939807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42323469 + ... + 42323542.

It is an arithmetic number, because the mean of its divisors is an integer number (804146614).

Almost surely, 2^3131939407 is an apocalyptic number.

3131939407 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

3131939407 is a deficient number, since it is larger than the sum of its proper divisors (84647049).

3131939407 is an equidigital number, since it uses as much as digits as its factorization.

3131939407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84647048.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 3131939407 is about 55963.7329616244. The cubic root of 3131939407 is about 1463.0902530122.

The spelling of 3131939407 in words is "three billion, one hundred thirty-one million, nine hundred thirty-nine thousand, four hundred seven".