16986947 has 4 divisors (see below), whose sum is σ = 16996056. Its totient is φ = 16977840.

The previous prime is 16986943. The next prime is 16986971. The reversal of 16986947 is 74968961.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74968961 = 6779 ⋅11059.

It is a cyclic number.

It is not a de Polignac number, because 16986947 - 2² = 16986943 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16986895 and 16986904.

It is not an unprimeable number, because it can be changed into a prime (16986941) 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, 629 + ... + 5862.

It is an arithmetic number, because the mean of its divisors is an integer number (4249014).

Almost surely, 2^16986947 is an apocalyptic number.

16986947 is a deficient number, since it is larger than the sum of its proper divisors (9109).

16986947 is an equidigital number, since it uses as much as digits as its factorization.

16986947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9108.

The product of its digits is 653184, while the sum is 50.

The square root of 16986947 is about 4121.5224128955. The cubic root of 16986947 is about 257.0623325317.

The spelling of 16986947 in words is "sixteen million, nine hundred eighty-six thousand, nine hundred forty-seven".