5291438189 has 4 divisors (see below), whose sum is σ = 5307140124. Its totient is φ = 5275736256.

The previous prime is 5291438183. The next prime is 5291438197. The reversal of 5291438189 is 9818341925.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1014932164 + 4276506025 = 31858^2 + 65395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5291438189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5291438183) 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, 7850462 + ... + 7851135.

It is an arithmetic number, because the mean of its divisors is an integer number (1326785031).

Almost surely, 2^5291438189 is an apocalyptic number.

It is an amenable number.

5291438189 is a deficient number, since it is larger than the sum of its proper divisors (15701935).

5291438189 is a wasteful number, since it uses less digits than its factorization.

5291438189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15701934.

The product of its digits is 622080, while the sum is 50.

The square root of 5291438189 is about 72742.2723662108. The cubic root of 5291438189 is about 1742.5740504695.

The spelling of 5291438189 in words is "five billion, two hundred ninety-one million, four hundred thirty-eight thousand, one hundred eighty-nine".