16137989 has 8 divisors (see below), whose sum is σ = 18485760. Its totient is φ = 13800816.

The previous prime is 16137983. The next prime is 16137991. The reversal of 16137989 is 98973161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16137989 - 2¹² = 16133893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16137983) 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, 947 + ... + 5759.

It is an arithmetic number, because the mean of its divisors is an integer number (2310720).

Almost surely, 2^16137989 is an apocalyptic number.

It is an amenable number.

16137989 is a deficient number, since it is larger than the sum of its proper divisors (2347771).

16137989 is an equidigital number, since it uses as much as digits as its factorization.

16137989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5299.

The product of its digits is 81648, while the sum is 44.

The square root of 16137989 is about 4017.2115951242. The cubic root of 16137989 is about 252.7065342820.

The spelling of 16137989 in words is "sixteen million, one hundred thirty-seven thousand, nine hundred eighty-nine".