31063889 has 2 divisors, whose sum is σ = 31063890. Its totient is φ = 31063888.

The previous prime is 31063867. The next prime is 31063897. The reversal of 31063889 is 98836013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20611600 + 10452289 = 4540^2 + 3233^2 .

It is a cyclic number.

It is not a de Polignac number, because 31063889 - 2⁸ = 31063633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31063289) 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, 15531944 + 15531945.

It is an arithmetic number, because the mean of its divisors is an integer number (15531945).

Almost surely, 2^31063889 is an apocalyptic number.

It is an amenable number.

31063889 is a deficient number, since it is larger than the sum of its proper divisors (1).

31063889 is an equidigital number, since it uses as much as digits as its factorization.

31063889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 31063889 is about 5573.4988113392. The cubic root of 31063889 is about 314.3537232497.

The spelling of 31063889 in words is "thirty-one million, sixty-three thousand, eight hundred eighty-nine".