617491 has 8 divisors (see below), whose sum is σ = 747360. Its totient is φ = 498048.

The previous prime is 617479. The next prime is 617509. The reversal of 617491 is 194716.

617491 = 294² + 295² + ... + 300².

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 617491 - 2⁷ = 617363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2476 + ... + 2713.

It is an arithmetic number, because the mean of its divisors is an integer number (93420).

2⁶¹⁷⁴⁹¹ is an apocalyptic number.

617491 is a deficient number, since it is larger than the sum of its proper divisors (129869).

617491 is a wasteful number, since it uses less digits than its factorization.

617491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5213.

The product of its digits is 1512, while the sum is 28.

The square root of 617491 is about 785.8059556914. The cubic root of 617491 is about 85.1550112577.

The spelling of 617491 in words is "six hundred seventeen thousand, four hundred ninety-one".