16861953 has 8 divisors (see below), whose sum is σ = 22502368. Its totient is φ = 11231424.

The previous prime is 16861939. The next prime is 16861981. The reversal of 16861953 is 35916861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16861953 - 2⁴ = 16861937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16861753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3750 + ... + 6912.

It is an arithmetic number, because the mean of its divisors is an integer number (2812796).

Almost surely, 2^16861953 is an apocalyptic number.

It is an amenable number.

16861953 is a deficient number, since it is larger than the sum of its proper divisors (5640415).

16861953 is a wasteful number, since it uses less digits than its factorization.

16861953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943.

The product of its digits is 38880, while the sum is 39.

The square root of 16861953 is about 4106.3308439530. The cubic root of 16861953 is about 256.4302710878.

The spelling of 16861953 in words is "sixteen million, eight hundred sixty-one thousand, nine hundred fifty-three".