16493387 has 4 divisors (see below), whose sum is σ = 17361480. Its totient is φ = 15625296.

The previous prime is 16493377. The next prime is 16493413. The reversal of 16493387 is 78339461.

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

It is not a de Polignac number, because 16493387 - 2⁸ = 16493131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16493377) 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, 434018 + ... + 434055.

It is an arithmetic number, because the mean of its divisors is an integer number (4340370).

Almost surely, 2^16493387 is an apocalyptic number.

16493387 is a deficient number, since it is larger than the sum of its proper divisors (868093).

16493387 is an equidigital number, since it uses as much as digits as its factorization.

16493387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868092.

The product of its digits is 108864, while the sum is 41.

The square root of 16493387 is about 4061.2051167110. The cubic root of 16493387 is about 254.5481527891.

The spelling of 16493387 in words is "sixteen million, four hundred ninety-three thousand, three hundred eighty-seven".