31269897 has 6 divisors (see below), whose sum is σ = 45167642. Its totient is φ = 20846592.

The previous prime is 31269863. The next prime is 31269907. The reversal of 31269897 is 79896213.

It can be written as a sum of positive squares in only one way, i.e., 28901376 + 2368521 = 5376^2 + 1539^2 .

It is not a de Polignac number, because 31269897 - 2¹⁹ = 30745609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31269827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1737208 + ... + 1737225.

Almost surely, 2^31269897 is an apocalyptic number.

It is an amenable number.

31269897 is a deficient number, since it is larger than the sum of its proper divisors (13897745).

31269897 is a wasteful number, since it uses less digits than its factorization.

31269897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3474439 (or 3474436 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 31269897 is about 5591.9493023453. The cubic root of 31269897 is about 315.0470980219.

The spelling of 31269897 in words is "thirty-one million, two hundred sixty-nine thousand, eight hundred ninety-seven".