16971849 has 28 divisors (see below), whose sum is σ = 26301952. Its totient is φ = 10935000.

The previous prime is 16971839. The next prime is 16971853. The reversal of 16971849 is 94817961.

It is a happy number.

It is not a de Polignac number, because 16971849 - 2⁹ = 16971337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16971839) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 22224 + ... + 22974.

Almost surely, 2^16971849 is an apocalyptic number.

It is an amenable number.

16971849 is a deficient number, since it is larger than the sum of its proper divisors (9330103).

16971849 is an frugal number, since it uses more digits than its factorization.

16971849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 785 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 16971849 is about 4119.6904009889. The cubic root of 16971849 is about 256.9861509492.

The spelling of 16971849 in words is "sixteen million, nine hundred seventy-one thousand, eight hundred forty-nine".