16129989 has 8 divisors (see below), whose sum is σ = 23896320. Its totient is φ = 10753308.

The previous prime is 16129963. The next prime is 16130021. The reversal of 16129989 is 98992161.

It is not a de Polignac number, because 16129989 - 2¹⁹ = 15605701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16129909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298677 + ... + 298730.

It is an arithmetic number, because the mean of its divisors is an integer number (2987040).

Almost surely, 2^16129989 is an apocalyptic number.

It is an amenable number.

16129989 is a deficient number, since it is larger than the sum of its proper divisors (7766331).

16129989 is an equidigital number, since it uses as much as digits as its factorization.

16129989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597416 (or 597410 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 16129989 is about 4016.2157561565. The cubic root of 16129989 is about 252.6647697551.

The spelling of 16129989 in words is "sixteen million, one hundred twenty-nine thousand, nine hundred eighty-nine".