31697041 has 4 divisors (see below), whose sum is σ = 31946752. Its totient is φ = 31447332.

The previous prime is 31696991. The next prime is 31697047. The reversal of 31697041 is 14079613.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 14079613 = 1699 ⋅8287.

It is a cyclic number.

It is not a de Polignac number, because 31697041 - 2¹⁷ = 31565969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31696994 and 31697012.

It is not an unprimeable number, because it can be changed into a prime (31697047) 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, 124665 + ... + 124918.

It is an arithmetic number, because the mean of its divisors is an integer number (7986688).

Almost surely, 2^31697041 is an apocalyptic number.

It is an amenable number.

31697041 is a deficient number, since it is larger than the sum of its proper divisors (249711).

31697041 is a wasteful number, since it uses less digits than its factorization.

31697041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249710.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 31697041 is about 5630.0125221886. The cubic root of 31697041 is about 316.4751204793.

The spelling of 31697041 in words is "thirty-one million, six hundred ninety-seven thousand, forty-one".