16019697 has 4 divisors (see below), whose sum is σ = 21359600. Its totient is φ = 10679796.

The previous prime is 16019681. The next prime is 16019713. The reversal of 16019697 is 79691061.

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: 79691061 = 3 ⋅26563687.

It is an interprime number because it is at equal distance from previous prime (16019681) and next prime (16019713).

It is not a de Polignac number, because 16019697 - 2⁴ = 16019681 is a prime.

It is a super-3 number, since 3×16019697³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16019677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2669947 + ... + 2669952.

It is an arithmetic number, because the mean of its divisors is an integer number (5339900).

Almost surely, 2^16019697 is an apocalyptic number.

It is an amenable number.

16019697 is a deficient number, since it is larger than the sum of its proper divisors (5339903).

16019697 is an equidigital number, since it uses as much as digits as its factorization.

16019697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5339902.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 16019697 is about 4002.4613677086. The cubic root of 16019697 is about 252.0875703467.

The spelling of 16019697 in words is "sixteen million, nineteen thousand, six hundred ninety-seven".