16493139 has 48 divisors (see below), whose sum is σ = 27885312. Its totient is φ = 9665568.

The previous prime is 16493137. The next prime is 16493149. The reversal of 16493139 is 93139461.

16493139 is a `hidden beast` number, since 1 + 649 + 3 + 1 + 3 + 9 = 666.

It is not a de Polignac number, because 16493139 - 2¹ = 16493137 is a prime.

It is a super-3 number, since 3×16493139³ (a number of 23 digits) contains 333 as substring.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16493131) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 72544 + ... + 72770.

It is an arithmetic number, because the mean of its divisors is an integer number (580944).

Almost surely, 2^16493139 is an apocalyptic number.

16493139 is a deficient number, since it is larger than the sum of its proper divisors (11392173).

16493139 is a wasteful number, since it uses less digits than its factorization.

16493139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 266 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 16493139 is about 4061.1745837873. The cubic root of 16493139 is about 254.5468769594.

The spelling of 16493139 in words is "sixteen million, four hundred ninety-three thousand, one hundred thirty-nine".