31645379 has 2 divisors, whose sum is σ = 31645380. Its totient is φ = 31645378.

The previous prime is 31645349. The next prime is 31645403. The reversal of 31645379 is 97354613.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31645379 - 2⁸ = 31645123 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31645319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15822689 + 15822690.

It is an arithmetic number, because the mean of its divisors is an integer number (15822690).

Almost surely, 2^31645379 is an apocalyptic number.

31645379 is a deficient number, since it is larger than the sum of its proper divisors (1).

31645379 is an equidigital number, since it uses as much as digits as its factorization.

31645379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 38.

The square root of 31645379 is about 5625.4225619059. The cubic root of 31645379 is about 316.3030894016.

The spelling of 31645379 in words is "thirty-one million, six hundred forty-five thousand, three hundred seventy-nine".