5191971 has 4 divisors (see below), whose sum is σ = 6922632. Its totient is φ = 3461312.

The previous prime is 5191943. The next prime is 5191981. The reversal of 5191971 is 1791915.

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 5191971 - 2⁷ = 5191843 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (5191931) 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, 865326 + ... + 865331.

It is an arithmetic number, because the mean of its divisors is an integer number (1730658).

Almost surely, 2^5191971 is an apocalyptic number.

5191971 is a deficient number, since it is larger than the sum of its proper divisors (1730661).

5191971 is a wasteful number, since it uses less digits than its factorization.

5191971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1730660.

The product of its digits is 2835, while the sum is 33.

The square root of 5191971 is about 2278.5896954037. The cubic root of 5191971 is about 173.1586080366.

The spelling of 5191971 in words is "five million, one hundred ninety-one thousand, nine hundred seventy-one".