31073869 has 2 divisors, whose sum is σ = 31073870. Its totient is φ = 31073868.

The previous prime is 31073849. The next prime is 31073879. The reversal of 31073869 is 96837013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29560969 + 1512900 = 5437^2 + 1230^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31073869 is a prime.

It is a super-2 number, since 2×31073869² = 1931170669258322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31073849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15536934 + 15536935.

It is an arithmetic number, because the mean of its divisors is an integer number (15536935).

Almost surely, 2^31073869 is an apocalyptic number.

It is an amenable number.

31073869 is a deficient number, since it is larger than the sum of its proper divisors (1).

31073869 is an equidigital number, since it uses as much as digits as its factorization.

31073869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 31073869 is about 5574.3940477867. The cubic root of 31073869 is about 314.3873841375.

The spelling of 31073869 in words is "thirty-one million, seventy-three thousand, eight hundred sixty-nine".