16199947 has 4 divisors (see below), whose sum is σ = 16276936. Its totient is φ = 16122960.

The previous prime is 16199921. The next prime is 16199971. The reversal of 16199947 is 74999161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74999161 = 2267 ⋅33083.

It is a cyclic number.

It is not a de Polignac number, because 16199947 - 2²³ = 7811339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16199897 and 16199906.

It is not an unprimeable number, because it can be changed into a prime (16199917) 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, 38178 + ... + 38599.

It is an arithmetic number, because the mean of its divisors is an integer number (4069234).

Almost surely, 2^16199947 is an apocalyptic number.

16199947 is a deficient number, since it is larger than the sum of its proper divisors (76989).

16199947 is an equidigital number, since it uses as much as digits as its factorization.

16199947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76988.

The product of its digits is 122472, while the sum is 46.

The square root of 16199947 is about 4024.9157755163. The cubic root of 16199947 is about 253.0295236524.

The spelling of 16199947 in words is "sixteen million, one hundred ninety-nine thousand, nine hundred forty-seven".