5091691 has 4 divisors (see below), whose sum is σ = 5554584. Its totient is φ = 4628800.

The previous prime is 5091689. The next prime is 5091703. The reversal of 5091691 is 1961905.

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

It is not a de Polignac number, because 5091691 - 2¹ = 5091689 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5091661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231430 + ... + 231451.

It is an arithmetic number, because the mean of its divisors is an integer number (1388646).

Almost surely, 2^5091691 is an apocalyptic number.

5091691 is a deficient number, since it is larger than the sum of its proper divisors (462893).

5091691 is a wasteful number, since it uses less digits than its factorization.

5091691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462892.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 5091691 is about 2256.4775647012. The cubic root of 5091691 is about 172.0365322617.

The spelling of 5091691 in words is "five million, ninety-one thousand, six hundred ninety-one".