16383691 has 4 divisors (see below), whose sum is σ = 16475400. Its totient is φ = 16291984.

The previous prime is 16383677. The next prime is 16383709. The reversal of 16383691 is 19638361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19638361 = 3253 ⋅6037.

It is a cyclic number.

It is not a de Polignac number, because 16383691 - 2²¹ = 14286539 is a prime.

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 16383691.

It is not an unprimeable number, because it can be changed into a prime (16383611) 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, 45586 + ... + 45943.

It is an arithmetic number, because the mean of its divisors is an integer number (4118850).

Almost surely, 2^16383691 is an apocalyptic number.

16383691 is a deficient number, since it is larger than the sum of its proper divisors (91709).

16383691 is an equidigital number, since it uses as much as digits as its factorization.

16383691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91708.

The product of its digits is 23328, while the sum is 37.

The square root of 16383691 is about 4047.6772351560. The cubic root of 16383691 is about 253.9825716026.

It can be divided in two parts, 1638 and 3691, that added together give a square (5329 = 73²).

The spelling of 16383691 in words is "sixteen million, three hundred eighty-three thousand, six hundred ninety-one".