31341997 has 16 divisors (see below), whose sum is σ = 33488640. Its totient is φ = 29291328.

The previous prime is 31341991. The next prime is 31342009. The reversal of 31341997 is 79914313.

It is a de Polignac number, because none of the positive numbers 2^k-31341997 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31341991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116379 + ... + 116647.

It is an arithmetic number, because the mean of its divisors is an integer number (2093040).

Almost surely, 2^31341997 is an apocalyptic number.

31341997 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

31341997 is a deficient number, since it is larger than the sum of its proper divisors (2146643).

31341997 is a wasteful number, since it uses less digits than its factorization.

31341997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420.

The product of its digits is 20412, while the sum is 37.

The square root of 31341997 is about 5598.3923585258. The cubic root of 31341997 is about 315.2890502094.

The spelling of 31341997 in words is "thirty-one million, three hundred forty-one thousand, nine hundred ninety-seven".