5431809 has 4 divisors (see below), whose sum is σ = 7242416. Its totient is φ = 3621204.

The previous prime is 5431807. The next prime is 5431813. The reversal of 5431809 is 9081345.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5431809 - 2¹ = 5431807 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5431801) 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, 905299 + ... + 905304.

It is an arithmetic number, because the mean of its divisors is an integer number (1810604).

Almost surely, 2^5431809 is an apocalyptic number.

It is an amenable number.

5431809 is a deficient number, since it is larger than the sum of its proper divisors (1810607).

5431809 is a wasteful number, since it uses less digits than its factorization.

5431809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810606.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 5431809 is about 2330.6241653257. The cubic root of 5431809 is about 175.7848718799.

The spelling of 5431809 in words is "five million, four hundred thirty-one thousand, eight hundred nine".