31969953 has 6 divisors (see below), whose sum is σ = 46178834. Its totient is φ = 21313296.

The previous prime is 31969943. The next prime is 31969963. The reversal of 31969953 is 35996913.

It is an interprime number because it is at equal distance from previous prime (31969943) and next prime (31969963).

It can be written as a sum of positive squares in only one way, i.e., 16548624 + 15421329 = 4068^2 + 3927^2 .

It is not a de Polignac number, because 31969953 - 2¹⁰ = 31968929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31969899 and 31969908.

It is not an unprimeable number, because it can be changed into a prime (31969933) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1776100 + ... + 1776117.

Almost surely, 2^31969953 is an apocalyptic number.

It is an amenable number.

31969953 is a deficient number, since it is larger than the sum of its proper divisors (14208881).

31969953 is a wasteful number, since it uses less digits than its factorization.

31969953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552223 (or 3552220 counting only the distinct ones).

The product of its digits is 196830, while the sum is 45.

The square root of 31969953 is about 5654.1978210883. The cubic root of 31969953 is about 317.3808112775.

The spelling of 31969953 in words is "thirty-one million, nine hundred sixty-nine thousand, nine hundred fifty-three".