16989149 has 2 divisors, whose sum is σ = 16989150. Its totient is φ = 16989148.

The previous prime is 16989143. The next prime is 16989163. The reversal of 16989149 is 94198961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9966649 + 7022500 = 3157^2 + 2650^2 .

It is a cyclic number.

It is not a de Polignac number, because 16989149 - 2¹² = 16985053 is a prime.

It is a Chen prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16989143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8494574 + 8494575.

It is an arithmetic number, because the mean of its divisors is an integer number (8494575).

Almost surely, 2^16989149 is an apocalyptic number.

It is an amenable number.

16989149 is a deficient number, since it is larger than the sum of its proper divisors (1).

16989149 is an equidigital number, since it uses as much as digits as its factorization.

16989149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 47.

The square root of 16989149 is about 4121.7895385378. The cubic root of 16989149 is about 257.0734396247.

The spelling of 16989149 in words is "sixteen million, nine hundred eighty-nine thousand, one hundred forty-nine".