16038989 has 2 divisors, whose sum is σ = 16038990. Its totient is φ = 16038988.

The previous prime is 16038961. The next prime is 16038991. The reversal of 16038989 is 98983061.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13446889 + 2592100 = 3667^2 + 1610^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16038989 is a prime.

It is a Sophie Germain prime.

Together with 16038991, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16038949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8019494 + 8019495.

It is an arithmetic number, because the mean of its divisors is an integer number (8019495).

Almost surely, 2^16038989 is an apocalyptic number.

It is an amenable number.

16038989 is a deficient number, since it is larger than the sum of its proper divisors (1).

16038989 is an equidigital number, since it uses as much as digits as its factorization.

16038989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 16038989 is about 4004.8706595844. The cubic root of 16038989 is about 252.1887233728.

The spelling of 16038989 in words is "sixteen million, thirty-eight thousand, nine hundred eighty-nine".