16387471 has 4 divisors (see below), whose sum is σ = 16556512. Its totient is φ = 16218432.

The previous prime is 16387457. The next prime is 16387487. The reversal of 16387471 is 17478361.

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 16387471 - 2¹¹ = 16385423 is a prime.

It is a super-3 number, since 3×16387471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16387471.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16381471) 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, 84375 + ... + 84568.

It is an arithmetic number, because the mean of its divisors is an integer number (4139128).

Almost surely, 2^16387471 is an apocalyptic number.

16387471 is a deficient number, since it is larger than the sum of its proper divisors (169041).

16387471 is an equidigital number, since it uses as much as digits as its factorization.

16387471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169040.

The product of its digits is 28224, while the sum is 37.

The square root of 16387471 is about 4048.1441426906. The cubic root of 16387471 is about 254.0021028201.

The spelling of 16387471 in words is "sixteen million, three hundred eighty-seven thousand, four hundred seventy-one".