31845379 has 2 divisors, whose sum is σ = 31845380. Its totient is φ = 31845378.

The previous prime is 31845371. The next prime is 31845383. The reversal of 31845379 is 97354813.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31845379 - 2³ = 31845371 is a prime.

It is a Chen prime.

It is equal to p_1964848 and since 31845379 and 1964848 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (31845371) 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, 15922689 + 15922690.

It is an arithmetic number, because the mean of its divisors is an integer number (15922690).

Almost surely, 2^31845379 is an apocalyptic number.

31845379 is a deficient number, since it is larger than the sum of its proper divisors (1).

31845379 is an equidigital number, since it uses as much as digits as its factorization.

31845379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 40.

The square root of 31845379 is about 5643.1710057378. The cubic root of 31845379 is about 316.9680397145.

The spelling of 31845379 in words is "thirty-one million, eight hundred forty-five thousand, three hundred seventy-nine".