31939390903 has 8 divisors (see below), whose sum is σ = 37760856480. Its totient is φ = 26432599200.

The previous prime is 31939390891. The next prime is 31939390939. The reversal of 31939390903 is 30909393913.

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

It is not a de Polignac number, because 31939390903 - 2¹³ = 31939382711 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 (31939090903) 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, 78668248 + ... + 78668653.

It is an arithmetic number, because the mean of its divisors is an integer number (4720107060).

Almost surely, 2^31939390903 is an apocalyptic number.

31939390903 is a deficient number, since it is larger than the sum of its proper divisors (5821465577).

31939390903 is a wasteful number, since it uses less digits than its factorization.

31939390903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157336937.

The product of its (nonzero) digits is 531441, while the sum is 49.

The spelling of 31939390903 in words is "thirty-one billion, nine hundred thirty-nine million, three hundred ninety thousand, nine hundred three".