31103997 has 8 divisors (see below), whose sum is σ = 41511840. Its totient is φ = 20716080.

The previous prime is 31103993. The next prime is 31104049. The reversal of 31103997 is 79930113.

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

It is not a de Polignac number, because 31103997 - 2² = 31103993 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 847 + ... + 7932.

It is an arithmetic number, because the mean of its divisors is an integer number (5188980).

Almost surely, 2^31103997 is an apocalyptic number.

It is an amenable number.

31103997 is a deficient number, since it is larger than the sum of its proper divisors (10407843).

31103997 is a wasteful number, since it uses less digits than its factorization.

31103997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9963.

The product of its (nonzero) digits is 5103, while the sum is 33.

The square root of 31103997 is about 5577.0957495815. The cubic root of 31103997 is about 314.4889571942.

The spelling of 31103997 in words is "thirty-one million, one hundred three thousand, nine hundred ninety-seven".