16091403 has 4 divisors (see below), whose sum is σ = 21455208. Its totient is φ = 10727600.

The previous prime is 16091399. The next prime is 16091407. The reversal of 16091403 is 30419061.

16091403 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (16091399) and next prime (16091407).

It is a cyclic number.

It is not a de Polignac number, because 16091403 - 2² = 16091399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16091407) 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, 2681898 + ... + 2681903.

It is an arithmetic number, because the mean of its divisors is an integer number (5363802).

Almost surely, 2^16091403 is an apocalyptic number.

16091403 is a deficient number, since it is larger than the sum of its proper divisors (5363805).

16091403 is an equidigital number, since it uses as much as digits as its factorization.

16091403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5363804.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 16091403 is about 4011.4091040431. The cubic root of 16091403 is about 252.4631348329.

The spelling of 16091403 in words is "sixteen million, ninety-one thousand, four hundred three".