16857953 has 4 divisors (see below), whose sum is σ = 19266240. Its totient is φ = 14449668.

The previous prime is 16857947. The next prime is 16857979. The reversal of 16857953 is 35975861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35975861 = 107 ⋅336223.

It is a cyclic number.

It is not a de Polignac number, because 16857953 - 2¹² = 16853857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16857923) 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, 1204133 + ... + 1204146.

It is an arithmetic number, because the mean of its divisors is an integer number (4816560).

Almost surely, 2^16857953 is an apocalyptic number.

It is an amenable number.

16857953 is a deficient number, since it is larger than the sum of its proper divisors (2408287).

16857953 is an equidigital number, since it uses as much as digits as its factorization.

16857953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408286.

The product of its digits is 226800, while the sum is 44.

The square root of 16857953 is about 4105.8437622491. The cubic root of 16857953 is about 256.4099926499.

The spelling of 16857953 in words is "sixteen million, eight hundred fifty-seven thousand, nine hundred fifty-three".