31393379 has 2 divisors, whose sum is σ = 31393380. Its totient is φ = 31393378.

The previous prime is 31393337. The next prime is 31393387. The reversal of 31393379 is 97339313.

It is a strong prime.

It is an emirp because it is prime and its reverse (97339313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31393379 - 2¹⁶ = 31327843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31393309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15696689 + 15696690.

It is an arithmetic number, because the mean of its divisors is an integer number (15696690).

Almost surely, 2^31393379 is an apocalyptic number.

31393379 is a deficient number, since it is larger than the sum of its proper divisors (1).

31393379 is an equidigital number, since it uses as much as digits as its factorization.

31393379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45927, while the sum is 38.

The square root of 31393379 is about 5602.9794752435. The cubic root of 31393379 is about 315.4612508638.

The spelling of 31393379 in words is "thirty-one million, three hundred ninety-three thousand, three hundred seventy-nine".