16137889 has 2 divisors, whose sum is σ = 16137890. Its totient is φ = 16137888.

The previous prime is 16137853. The next prime is 16137893. The reversal of 16137889 is 98873161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16136289 + 1600 = 4017^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 16137889 - 2²³ = 7749281 is a prime.

It is a super-2 number, since 2×16137889² = 520862922752642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16137829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8068944 + 8068945.

It is an arithmetic number, because the mean of its divisors is an integer number (8068945).

Almost surely, 2^16137889 is an apocalyptic number.

It is an amenable number.

16137889 is a deficient number, since it is larger than the sum of its proper divisors (1).

16137889 is an equidigital number, since it uses as much as digits as its factorization.

16137889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 43.

The square root of 16137889 is about 4017.1991486607. The cubic root of 16137889 is about 252.7060123107.

The spelling of 16137889 in words is "sixteen million, one hundred thirty-seven thousand, eight hundred eighty-nine".