31874869 has 4 divisors (see below), whose sum is σ = 34326796. Its totient is φ = 29422944.

The previous prime is 31874863. The next prime is 31874873. The reversal of 31874869 is 96847813.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96847813 = 31 ⋅3124123.

It can be written as a sum of positive squares in 2 ways, for example, as 9690769 + 22184100 = 3113^2 + 4710^2 .

It is a cyclic number.

It is not a de Polignac number, because 31874869 - 2⁹ = 31874357 is a prime.

It is a super-2 number, since 2×31874869² = 2032014547534322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31874863) 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, 1225944 + ... + 1225969.

It is an arithmetic number, because the mean of its divisors is an integer number (8581699).

Almost surely, 2^31874869 is an apocalyptic number.

It is an amenable number.

31874869 is a deficient number, since it is larger than the sum of its proper divisors (2451927).

31874869 is a wasteful number, since it uses less digits than its factorization.

31874869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451926.

The product of its digits is 290304, while the sum is 46.

The square root of 31874869 is about 5645.7832937512. The cubic root of 31874869 is about 317.0658509086.

The spelling of 31874869 in words is "thirty-one million, eight hundred seventy-four thousand, eight hundred sixty-nine".