617969 has 4 divisors (see below), whose sum is σ = 674160. Its totient is φ = 561780.

The previous prime is 617963. The next prime is 617971. The reversal of 617969 is 969716.

617969 = 232² + 233² + ... + 242².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-617969 is a prime.

It is a super-2 number, since 2×617969² = 763771369922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28079 + ... + 28100.

It is an arithmetic number, because the mean of its divisors is an integer number (168540).

2⁶¹⁷⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

617969 is a deficient number, since it is larger than the sum of its proper divisors (56191).

617969 is a wasteful number, since it uses less digits than its factorization.

617969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56190.

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

The square root of 617969 is about 786.1100431873. The cubic root of 617969 is about 85.1769784318.

The spelling of 617969 in words is "six hundred seventeen thousand, nine hundred sixty-nine".