31414891 has 2 divisors, whose sum is σ = 31414892. Its totient is φ = 31414890.

The previous prime is 31414853. The next prime is 31414913. The reversal of 31414891 is 19841413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31414891 - 2⁹ = 31414379 is a prime.

It is not a weakly prime, because it can be changed into another prime (31414991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15707445 + 15707446.

It is an arithmetic number, because the mean of its divisors is an integer number (15707446).

Almost surely, 2^31414891 is an apocalyptic number.

31414891 is a deficient number, since it is larger than the sum of its proper divisors (1).

31414891 is an equidigital number, since it uses as much as digits as its factorization.

31414891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 31.

The square root of 31414891 is about 5604.8988394083. The cubic root of 31414891 is about 315.5332899707.

The spelling of 31414891 in words is "thirty-one million, four hundred fourteen thousand, eight hundred ninety-one".