617931329 has 2 divisors, whose sum is σ = 617931330. Its totient is φ = 617931328.

The previous prime is 617931289. The next prime is 617931331. The reversal of 617931329 is 923139716.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538240000 + 79691329 = 23200^2 + 8927^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617931329 is a prime.

Together with 617931331, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (617931829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308965664 + 308965665.

It is an arithmetic number, because the mean of its divisors is an integer number (308965665).

Almost surely, 2^617931329 is an apocalyptic number.

It is an amenable number.

617931329 is a deficient number, since it is larger than the sum of its proper divisors (1).

617931329 is an equidigital number, since it uses as much as digits as its factorization.

617931329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61236, while the sum is 41.

The square root of 617931329 is about 24858.2245745749. The cubic root of 617931329 is about 851.7524761833.

The spelling of 617931329 in words is "six hundred seventeen million, nine hundred thirty-one thousand, three hundred twenty-nine".