31113073 has 2 divisors, whose sum is σ = 31113074. Its totient is φ = 31113072.

The previous prime is 31113059. The next prime is 31113083. The reversal of 31113073 is 37031113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30824704 + 288369 = 5552^2 + 537^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31113073 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31113073.

It is not a weakly prime, because it can be changed into another prime (31113023) 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, 15556536 + 15556537.

It is an arithmetic number, because the mean of its divisors is an integer number (15556537).

Almost surely, 2^31113073 is an apocalyptic number.

It is an amenable number.

31113073 is a deficient number, since it is larger than the sum of its proper divisors (1).

31113073 is an equidigital number, since it uses as much as digits as its factorization.

31113073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 189, while the sum is 19.

The square root of 31113073 is about 5577.9093753843. The cubic root of 31113073 is about 314.5195430189.

Adding to 31113073 its reverse (37031113), we get a palindrome (68144186).

The spelling of 31113073 in words is "thirty-one million, one hundred thirteen thousand, seventy-three".