5191639 has 4 divisors (see below), whose sum is σ = 5203224. Its totient is φ = 5180056.

The previous prime is 5191603. The next prime is 5191651. The reversal of 5191639 is 9361915.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5191639 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 (5191699) 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, 5092 + ... + 6025.

It is an arithmetic number, because the mean of its divisors is an integer number (1300806).

Almost surely, 2^5191639 is an apocalyptic number.

5191639 is a deficient number, since it is larger than the sum of its proper divisors (11585).

5191639 is a wasteful number, since it uses less digits than its factorization.

5191639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11584.

The product of its digits is 7290, while the sum is 34.

The square root of 5191639 is about 2278.5168421585. The cubic root of 5191639 is about 173.1549170887.

The spelling of 5191639 in words is "five million, one hundred ninety-one thousand, six hundred thirty-nine".