16291489 has 8 divisors (see below), whose sum is σ = 16565472. Its totient is φ = 16019520.

The previous prime is 16291481. The next prime is 16291571. The reversal of 16291489 is 98419261.

16291489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 16291489 - 2³ = 16291481 is a prime.

It is a super-2 number, since 2×16291489² = 530825227674242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16291481) 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, 27177 + ... + 27769.

It is an arithmetic number, because the mean of its divisors is an integer number (2070684).

Almost surely, 2^16291489 is an apocalyptic number.

It is an amenable number.

16291489 is a deficient number, since it is larger than the sum of its proper divisors (273983).

16291489 is an equidigital number, since it uses as much as digits as its factorization.

16291489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007.

The product of its digits is 31104, while the sum is 40.

The square root of 16291489 is about 4036.2716707377. The cubic root of 16291489 is about 253.5052317090.

The spelling of 16291489 in words is "sixteen million, two hundred ninety-one thousand, four hundred eighty-nine".