31374869 has 2 divisors, whose sum is σ = 31374870. Its totient is φ = 31374868.

The previous prime is 31374859. The next prime is 31374899. The reversal of 31374869 is 96847313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27952369 + 3422500 = 5287^2 + 1850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31374869 is a prime.

It is a super-2 number, since 2×31374869² = 1968764809534322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31374859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15687434 + 15687435.

It is an arithmetic number, because the mean of its divisors is an integer number (15687435).

Almost surely, 2^31374869 is an apocalyptic number.

It is an amenable number.

31374869 is a deficient number, since it is larger than the sum of its proper divisors (1).

31374869 is an equidigital number, since it uses as much as digits as its factorization.

31374869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 31374869 is about 5601.3274319575. The cubic root of 31374869 is about 315.3992384699.

The spelling of 31374869 in words is "thirty-one million, three hundred seventy-four thousand, eight hundred sixty-nine".