16598961 has 6 divisors (see below), whose sum is σ = 23976290. Its totient is φ = 11065968.

The previous prime is 16598947. The next prime is 16598969. The reversal of 16598961 is 16989561.

It can be written as a sum of positive squares in only one way, i.e., 16353936 + 245025 = 4044^2 + 495^2 .

It is not a de Polignac number, because 16598961 - 2⁷ = 16598833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16598969) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 922156 + ... + 922173.

Almost surely, 2^16598961 is an apocalyptic number.

It is an amenable number.

16598961 is a deficient number, since it is larger than the sum of its proper divisors (7377329).

16598961 is a wasteful number, since it uses less digits than its factorization.

16598961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1844335 (or 1844332 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 16598961 is about 4074.1822492373. The cubic root of 16598961 is about 255.0901180905.

The spelling of 16598961 in words is "sixteen million, five hundred ninety-eight thousand, nine hundred sixty-one".