617999161 has 8 divisors (see below), whose sum is σ = 665766920. Its totient is φ = 570264192.

The previous prime is 617999131. The next prime is 617999183. The reversal of 617999161 is 161999716.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 67815225 + 550183936 = 8235^2 + 23456^2 .

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 617999161 - 2⁷ = 617999033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (617999131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42691 + ... + 55303.

It is an arithmetic number, because the mean of its divisors is an integer number (83220865).

Almost surely, 2^617999161 is an apocalyptic number.

It is an amenable number.

617999161 is a deficient number, since it is larger than the sum of its proper divisors (47767759).

617999161 is a wasteful number, since it uses less digits than its factorization.

617999161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16395.

The product of its digits is 183708, while the sum is 49.

The square root of 617999161 is about 24859.5889145416. The cubic root of 617999161 is about 851.7836414370.

The spelling of 617999161 in words is "six hundred seventeen million, nine hundred ninety-nine thousand, one hundred sixty-one".