16136989 has 4 divisors (see below), whose sum is σ = 17604000. Its totient is φ = 14669980.

The previous prime is 16136983. The next prime is 16136999. The reversal of 16136989 is 98963161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98963161 = 11 ⋅8996651.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16136989 is a prime.

It is a super-2 number, since 2×16136989² = 520804827972242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16136983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733489 + ... + 733510.

It is an arithmetic number, because the mean of its divisors is an integer number (4401000).

Almost surely, 2^16136989 is an apocalyptic number.

It is an amenable number.

16136989 is a deficient number, since it is larger than the sum of its proper divisors (1467011).

16136989 is a wasteful number, since it uses less digits than its factorization.

16136989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1467010.

The product of its digits is 69984, while the sum is 43.

The square root of 16136989 is about 4017.0871287539. The cubic root of 16136989 is about 252.7013144711.

The spelling of 16136989 in words is "sixteen million, one hundred thirty-six thousand, nine hundred eighty-nine".