16481399 has 4 divisors (see below), whose sum is σ = 17979720. Its totient is φ = 14983080.

The previous prime is 16481383. The next prime is 16481401. The reversal of 16481399 is 99318461.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 16481399 - 2⁴ = 16481383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16481329) 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, 749144 + ... + 749165.

It is an arithmetic number, because the mean of its divisors is an integer number (4494930).

Almost surely, 2^16481399 is an apocalyptic number.

16481399 is a deficient number, since it is larger than the sum of its proper divisors (1498321).

16481399 is a wasteful number, since it uses less digits than its factorization.

16481399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1498320.

The product of its digits is 46656, while the sum is 41.

The square root of 16481399 is about 4059.7289318377. The cubic root of 16481399 is about 254.4864661896.

The spelling of 16481399 in words is "sixteen million, four hundred eighty-one thousand, three hundred ninety-nine".