31248479 has 2 divisors, whose sum is σ = 31248480. Its totient is φ = 31248478.

The previous prime is 31248473. The next prime is 31248493. The reversal of 31248479 is 97484213.

It is a weak prime.

It is an emirp because it is prime and its reverse (97484213) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31248479 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31248473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15624239 + 15624240.

It is an arithmetic number, because the mean of its divisors is an integer number (15624240).

Almost surely, 2^31248479 is an apocalyptic number.

31248479 is a deficient number, since it is larger than the sum of its proper divisors (1).

31248479 is an equidigital number, since it uses as much as digits as its factorization.

31248479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 38.

The square root of 31248479 is about 5590.0338997183. The cubic root of 31248479 is about 314.9751521510.

The spelling of 31248479 in words is "thirty-one million, two hundred forty-eight thousand, four hundred seventy-nine".