31324493 has 2 divisors, whose sum is σ = 31324494. Its totient is φ = 31324492.

The previous prime is 31324471. The next prime is 31324507. The reversal of 31324493 is 39442313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24423364 + 6901129 = 4942^2 + 2627^2 .

It is an emirp because it is prime and its reverse (39442313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31324493 - 2²² = 27130189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31324453) 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, 15662246 + 15662247.

It is an arithmetic number, because the mean of its divisors is an integer number (15662247).

Almost surely, 2^31324493 is an apocalyptic number.

It is an amenable number.

31324493 is a deficient number, since it is larger than the sum of its proper divisors (1).

31324493 is an equidigital number, since it uses as much as digits as its factorization.

31324493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 29.

The square root of 31324493 is about 5596.8288342596. The cubic root of 31324493 is about 315.2303446623.

The spelling of 31324493 in words is "thirty-one million, three hundred twenty-four thousand, four hundred ninety-three".