31045493 has 2 divisors, whose sum is σ = 31045494. Its totient is φ = 31045492.

The previous prime is 31045447. The next prime is 31045537. The reversal of 31045493 is 39454013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24780484 + 6265009 = 4978^2 + 2503^2 .

It is a cyclic number.

It is not a de Polignac number, because 31045493 - 2⁶ = 31045429 is a prime.

It is a super-2 number, since 2×31045493² = 1927645271226098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31045093) 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, 15522746 + 15522747.

It is an arithmetic number, because the mean of its divisors is an integer number (15522747).

Almost surely, 2^31045493 is an apocalyptic number.

It is an amenable number.

31045493 is a deficient number, since it is larger than the sum of its proper divisors (1).

31045493 is an equidigital number, since it uses as much as digits as its factorization.

31045493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 31045493 is about 5571.8482570867. The cubic root of 31045493 is about 314.2916576897.

The spelling of 31045493 in words is "thirty-one million, forty-five thousand, four hundred ninety-three".