16505697 has 16 divisors (see below), whose sum is σ = 24732288. Its totient is φ = 9715200.

The previous prime is 16505683. The next prime is 16505701. The reversal of 16505697 is 79650561.

It is not a de Polignac number, because 16505697 - 2¹¹ = 16503649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (16505627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8304 + ... + 10097.

It is an arithmetic number, because the mean of its divisors is an integer number (1545768).

Almost surely, 2^16505697 is an apocalyptic number.

It is an amenable number.

16505697 is a deficient number, since it is larger than the sum of its proper divisors (8226591).

16505697 is a wasteful number, since it uses less digits than its factorization.

16505697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18440.

The product of its (nonzero) digits is 56700, while the sum is 39.

The square root of 16505697 is about 4062.7203940217. The cubic root of 16505697 is about 254.6114652047.

The spelling of 16505697 in words is "sixteen million, five hundred five thousand, six hundred ninety-seven".