16145689 has 4 divisors (see below), whose sum is σ = 18452224. Its totient is φ = 13839156.

The previous prime is 16145681. The next prime is 16145693. The reversal of 16145689 is 98654161.

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.

It is a cyclic number.

It is not a de Polignac number, because 16145689 - 2³ = 16145681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16145681) 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, 1153257 + ... + 1153270.

It is an arithmetic number, because the mean of its divisors is an integer number (4613056).

Almost surely, 2^16145689 is an apocalyptic number.

It is an amenable number.

16145689 is a deficient number, since it is larger than the sum of its proper divisors (2306535).

16145689 is an equidigital number, since it uses as much as digits as its factorization.

16145689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306534.

The product of its digits is 51840, while the sum is 40.

The square root of 16145689 is about 4018.1698570369. The cubic root of 16145689 is about 252.7467196054.

The spelling of 16145689 in words is "sixteen million, one hundred forty-five thousand, six hundred eighty-nine".