31374121 has 2 divisors, whose sum is σ = 31374122. Its totient is φ = 31374120.

The previous prime is 31374089. The next prime is 31374127. The reversal of 31374121 is 12147313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30958096 + 416025 = 5564^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 31374121 - 2⁵ = 31374089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31374092 and 31374101.

It is not a weakly prime, because it can be changed into another prime (31374127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15687060 + 15687061.

It is an arithmetic number, because the mean of its divisors is an integer number (15687061).

Almost surely, 2^31374121 is an apocalyptic number.

It is an amenable number.

31374121 is a deficient number, since it is larger than the sum of its proper divisors (1).

31374121 is an equidigital number, since it uses as much as digits as its factorization.

31374121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 504, while the sum is 22.

The square root of 31374121 is about 5601.2606616725. The cubic root of 31374121 is about 315.3967319999.

The spelling of 31374121 in words is "thirty-one million, three hundred seventy-four thousand, one hundred twenty-one".