31623113 has 2 divisors, whose sum is σ = 31623114. Its totient is φ = 31623112.

The previous prime is 31623061. The next prime is 31623121. The reversal of 31623113 is 31132613.

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., 17205904 + 14417209 = 4148^2 + 3797^2 .

It is a cyclic number.

It is not a de Polignac number, because 31623113 - 2¹² = 31619017 is a prime.

It is not a weakly prime, because it can be changed into another prime (31623173) 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, 15811556 + 15811557.

It is an arithmetic number, because the mean of its divisors is an integer number (15811557).

Almost surely, 2^31623113 is an apocalyptic number.

It is an amenable number.

31623113 is a deficient number, since it is larger than the sum of its proper divisors (1).

31623113 is an equidigital number, since it uses as much as digits as its factorization.

31623113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324, while the sum is 20.

The square root of 31623113 is about 5623.4431623339. The cubic root of 31623113 is about 316.2288873406.

Adding to 31623113 its reverse (31132613), we get a palindrome (62755726).

The spelling of 31623113 in words is "thirty-one million, six hundred twenty-three thousand, one hundred thirteen".