617391 has 12 divisors (see below), whose sum is σ = 899080. Its totient is φ = 408240.

The previous prime is 617387. The next prime is 617401. The reversal of 617391 is 193716.

It is not a de Polignac number, because 617391 - 2² = 617387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617311) 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 in 11 ways as a sum of consecutive naturals, for example, 1440 + ... + 1818.

2⁶¹⁷³⁹¹ is an apocalyptic number.

617391 is a deficient number, since it is larger than the sum of its proper divisors (281689).

617391 is a wasteful number, since it uses less digits than its factorization.

617391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 566 (or 563 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 617391 is about 785.7423241750. The cubic root of 617391 is about 85.1504141808.

The spelling of 617391 in words is "six hundred seventeen thousand, three hundred ninety-one".