16685953 has 4 divisors (see below), whose sum is σ = 16796608. Its totient is φ = 16575300.

The previous prime is 16685947. The next prime is 16685969. The reversal of 16685953 is 35958661.

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: 35958661 = 1913 ⋅18797.

It is a cyclic number.

It is not a de Polignac number, because 16685953 - 2⁹ = 16685441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16685983) 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, 55101 + ... + 55402.

It is an arithmetic number, because the mean of its divisors is an integer number (4199152).

Almost surely, 2^16685953 is an apocalyptic number.

It is an amenable number.

16685953 is a deficient number, since it is larger than the sum of its proper divisors (110655).

16685953 is a wasteful number, since it uses less digits than its factorization.

16685953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110654.

The product of its digits is 194400, while the sum is 43.

The square root of 16685953 is about 4084.8443054785. The cubic root of 16685953 is about 255.5349681448.

The spelling of 16685953 in words is "sixteen million, six hundred eighty-five thousand, nine hundred fifty-three".