617306897 has 4 divisors (see below), whose sum is σ = 617383140. Its totient is φ = 617230656.

The previous prime is 617306863. The next prime is 617306951. The reversal of 617306897 is 798603716.

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

It can be written as a sum of positive squares in 2 ways, for example, as 47004736 + 570302161 = 6856^2 + 23881^2 .

It is a cyclic number.

It is not a de Polignac number, because 617306897 - 2¹⁰ = 617305873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (617306857) 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, 24308 + ... + 42725.

It is an arithmetic number, because the mean of its divisors is an integer number (154345785).

Almost surely, 2^617306897 is an apocalyptic number.

It is an amenable number.

617306897 is a deficient number, since it is larger than the sum of its proper divisors (76243).

617306897 is an equidigital number, since it uses as much as digits as its factorization.

617306897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76242.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 617306897 is about 24845.6615327505. The cubic root of 617306897 is about 851.4654751687.

The spelling of 617306897 in words is "six hundred seventeen million, three hundred six thousand, eight hundred ninety-seven".