617390129 has 2 divisors, whose sum is σ = 617390130. Its totient is φ = 617390128.

The previous prime is 617390099. The next prime is 617390131. The reversal of 617390129 is 921093716.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419143729 + 198246400 = 20473^2 + 14080^2 .

It is a cyclic number.

It is not a de Polignac number, because 617390129 - 2⁸ = 617389873 is a prime.

It is a Sophie Germain prime.

Together with 617390131, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 617390092 and 617390101.

It is not a weakly prime, because it can be changed into another prime (617090129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 308695064 + 308695065.

It is an arithmetic number, because the mean of its divisors is an integer number (308695065).

Almost surely, 2^617390129 is an apocalyptic number.

It is an amenable number.

617390129 is a deficient number, since it is larger than the sum of its proper divisors (1).

617390129 is an equidigital number, since it uses as much as digits as its factorization.

617390129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 617390129 is about 24847.3364568519. The cubic root of 617390129 is about 851.5037413806.

The spelling of 617390129 in words is "six hundred seventeen million, three hundred ninety thousand, one hundred twenty-nine".