5423991 has 4 divisors (see below), whose sum is σ = 7231992. Its totient is φ = 3615992.

The previous prime is 5423989. The next prime is 5424011. The reversal of 5423991 is 1993245.

5423991 is digitally balanced in base 3, because in such base 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 a cyclic number.

It is not a de Polignac number, because 5423991 - 2¹ = 5423989 is a prime.

It is a D-number.

5423991 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5423921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 903996 + ... + 904001.

It is an arithmetic number, because the mean of its divisors is an integer number (1807998).

Almost surely, 2^5423991 is an apocalyptic number.

5423991 is a deficient number, since it is larger than the sum of its proper divisors (1808001).

5423991 is a wasteful number, since it uses less digits than its factorization.

5423991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808000.

The product of its digits is 9720, while the sum is 33.

The square root of 5423991 is about 2328.9463282781. The cubic root of 5423991 is about 175.7004956931.

The spelling of 5423991 in words is "five million, four hundred twenty-three thousand, nine hundred ninety-one".