5091389 has 4 divisors (see below), whose sum is σ = 5096256. Its totient is φ = 5086524.

The previous prime is 5091379. The next prime is 5091407. The reversal of 5091389 is 9831905.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9831905 = 5 ⋅1966381.

It is a cyclic number.

It is not a de Polignac number, because 5091389 - 2¹² = 5087293 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5091379) 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, 149 + ... + 3194.

It is an arithmetic number, because the mean of its divisors is an integer number (1274064).

Almost surely, 2^5091389 is an apocalyptic number.

It is an amenable number.

5091389 is a deficient number, since it is larger than the sum of its proper divisors (4867).

5091389 is a wasteful number, since it uses less digits than its factorization.

5091389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4866.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 5091389 is about 2256.4106452505. The cubic root of 5091389 is about 172.0331308993.

The spelling of 5091389 in words is "five million, ninety-one thousand, three hundred eighty-nine".