31103983 has 4 divisors (see below), whose sum is σ = 31149688. Its totient is φ = 31058280.

The previous prime is 31103957. The next prime is 31103993. The reversal of 31103983 is 38930113.

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 31103983 - 2¹³ = 31095791 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 (31103993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21816 + ... + 23197.

It is an arithmetic number, because the mean of its divisors is an integer number (7787422).

Almost surely, 2^31103983 is an apocalyptic number.

31103983 is a deficient number, since it is larger than the sum of its proper divisors (45705).

31103983 is an equidigital number, since it uses as much as digits as its factorization.

31103983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45704.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 31103983 is about 5577.0944944478. The cubic root of 31103983 is about 314.4889100100.

The spelling of 31103983 in words is "thirty-one million, one hundred three thousand, nine hundred eighty-three".