31874149 has 2 divisors, whose sum is σ = 31874150. Its totient is φ = 31874148.

The previous prime is 31874093. The next prime is 31874173. The reversal of 31874149 is 94147813.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 3305124 = 5345^2 + 1818^2 .

It is a cyclic number.

It is not a de Polignac number, because 31874149 - 2⁹ = 31873637 is a prime.

It is a super-2 number, since 2×31874149² = 2031922748948402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31874189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15937074 + 15937075.

It is an arithmetic number, because the mean of its divisors is an integer number (15937075).

Almost surely, 2^31874149 is an apocalyptic number.

It is an amenable number.

31874149 is a deficient number, since it is larger than the sum of its proper divisors (1).

31874149 is an equidigital number, since it uses as much as digits as its factorization.

31874149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 31874149 is about 5645.7195289883. The cubic root of 31874149 is about 317.0634635614.

It can be divided in two parts, 31874 and 149, that added together give a palindrome (32023).

The spelling of 31874149 in words is "thirty-one million, eight hundred seventy-four thousand, one hundred forty-nine".