16989967 has 2 divisors, whose sum is σ = 16989968. Its totient is φ = 16989966.

The previous prime is 16989943. The next prime is 16989991. The reversal of 16989967 is 76998961.

It is a balanced prime because it is at equal distance from previous prime (16989943) and next prime (16989991).

It is a cyclic number.

It is not a de Polignac number, because 16989967 - 2¹⁹ = 16465679 is a prime.

It is a super-2 number, since 2×16989967² = 577317957322178, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16989937) 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 as a sum of consecutive naturals, namely, 8494983 + 8494984.

It is an arithmetic number, because the mean of its divisors is an integer number (8494984).

Almost surely, 2^16989967 is an apocalyptic number.

16989967 is a deficient number, since it is larger than the sum of its proper divisors (1).

16989967 is an equidigital number, since it uses as much as digits as its factorization.

16989967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1469664, while the sum is 55.

The square root of 16989967 is about 4121.8887660877. Note that the first 3 decimals coincide. The cubic root of 16989967 is about 257.0775654483.

It can be divided in two parts, 16989 and 967, that added together give a square (17956 = 134²).

The spelling of 16989967 in words is "sixteen million, nine hundred eighty-nine thousand, nine hundred sixty-seven".