5091191 has 4 divisors (see below), whose sum is σ = 5818512. Its totient is φ = 4363872.

The previous prime is 5091173. The next prime is 5091193. The reversal of 5091191 is 1911905.

It is a happy number.

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 5091191 - 2¹⁴ = 5074807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5091191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5091193) 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, 363650 + ... + 363663.

It is an arithmetic number, because the mean of its divisors is an integer number (1454628).

Almost surely, 2^5091191 is an apocalyptic number.

5091191 is a deficient number, since it is larger than the sum of its proper divisors (727321).

5091191 is an equidigital number, since it uses as much as digits as its factorization.

5091191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727320.

The product of its (nonzero) digits is 405, while the sum is 26.

The square root of 5091191 is about 2256.3667698315. The cubic root of 5091191 is about 172.0309007939.

The spelling of 5091191 in words is "five million, ninety-one thousand, one hundred ninety-one".