16165489 has 2 divisors, whose sum is σ = 16165490. Its totient is φ = 16165488.

The previous prime is 16165483. The next prime is 16165507. The reversal of 16165489 is 98456161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15272464 + 893025 = 3908^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 16165489 - 2⁷ = 16165361 is a prime.

It is a super-2 number, since 2×16165489² = 522646069218242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16165483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8082744 + 8082745.

It is an arithmetic number, because the mean of its divisors is an integer number (8082745).

Almost surely, 2^16165489 is an apocalyptic number.

It is an amenable number.

16165489 is a deficient number, since it is larger than the sum of its proper divisors (1).

16165489 is an equidigital number, since it uses as much as digits as its factorization.

16165489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 16165489 is about 4020.6329103762. The cubic root of 16165489 is about 252.8499946604.

The spelling of 16165489 in words is "sixteen million, one hundred sixty-five thousand, four hundred eighty-nine".