16487989 has 8 divisors (see below), whose sum is σ = 18910080. Its totient is φ = 14082576.

The previous prime is 16487971. The next prime is 16488007. The reversal of 16487989 is 98978461.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16487971) and next prime (16488007).

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 16487989 - 2⁵ = 16487957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16487959) 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, 1969 + ... + 6070.

It is an arithmetic number, because the mean of its divisors is an integer number (2363760).

Almost surely, 2^16487989 is an apocalyptic number.

It is an amenable number.

16487989 is a deficient number, since it is larger than the sum of its proper divisors (2422091).

16487989 is an equidigital number, since it uses as much as digits as its factorization.

16487989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8339.

The product of its digits is 870912, while the sum is 52.

The square root of 16487989 is about 4060.5404812660. The cubic root of 16487989 is about 254.5203800247.

The spelling of 16487989 in words is "sixteen million, four hundred eighty-seven thousand, nine hundred eighty-nine".