16199397 has 12 divisors (see below), whose sum is σ = 23841324. Its totient is φ = 10595520.

The previous prime is 16199363. The next prime is 16199411. The reversal of 16199397 is 79399161.

It can be written as a sum of positive squares in 2 ways, for example, as 5447556 + 10751841 = 2334^2 + 3279^2 .

It is not a de Polignac number, because 16199397 - 2⁶ = 16199333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16195397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16504 + ... + 17457.

It is an arithmetic number, because the mean of its divisors is an integer number (1986777).

Almost surely, 2^16199397 is an apocalyptic number.

It is an amenable number.

16199397 is a deficient number, since it is larger than the sum of its proper divisors (7641927).

16199397 is a wasteful number, since it uses less digits than its factorization.

16199397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34020 (or 34017 counting only the distinct ones).

The product of its digits is 91854, while the sum is 45.

The square root of 16199397 is about 4024.8474505253. The cubic root of 16199397 is about 253.0266601078.

The spelling of 16199397 in words is "sixteen million, one hundred ninety-nine thousand, three hundred ninety-seven".