617713391 has 2 divisors, whose sum is σ = 617713392. Its totient is φ = 617713390.

The previous prime is 617713387. The next prime is 617713417. The reversal of 617713391 is 193317716.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 617713391 - 2² = 617713387 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 (617713331) 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, 308856695 + 308856696.

It is an arithmetic number, because the mean of its divisors is an integer number (308856696).

Almost surely, 2^617713391 is an apocalyptic number.

617713391 is a deficient number, since it is larger than the sum of its proper divisors (1).

617713391 is an equidigital number, since it uses as much as digits as its factorization.

617713391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23814, while the sum is 38.

The square root of 617713391 is about 24853.8405684112. The cubic root of 617713391 is about 851.6523296406.

The spelling of 617713391 in words is "six hundred seventeen million, seven hundred thirteen thousand, three hundred ninety-one".