617730671 has 4 divisors (see below), whose sum is σ = 622239792. Its totient is φ = 613221552.

The previous prime is 617730643. The next prime is 617730691. The reversal of 617730671 is 176037716.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 617730671 - 2²² = 613536367 is a prime.

It is a super-2 number, since 2×617730671² = 763182363788220482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617730691) 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, 2254355 + ... + 2254628.

It is an arithmetic number, because the mean of its divisors is an integer number (155559948).

Almost surely, 2^617730671 is an apocalyptic number.

617730671 is a deficient number, since it is larger than the sum of its proper divisors (4509121).

617730671 is a wasteful number, since it uses less digits than its factorization.

617730671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509120.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 617730671 is about 24854.1881983701. The cubic root of 617730671 is about 851.6602709800.

The spelling of 617730671 in words is "six hundred seventeen million, seven hundred thirty thousand, six hundred seventy-one".