5627991 has 4 divisors (see below), whose sum is σ = 7503992. Its totient is φ = 3751992.

The previous prime is 5627989. The next prime is 5628041. The reversal of 5627991 is 1997265.

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

It is not a de Polignac number, because 5627991 - 2¹ = 5627989 is a prime.

It is an Ulam number.

It is a D-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 (5627191) 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, 937996 + ... + 938001.

It is an arithmetic number, because the mean of its divisors is an integer number (1875998).

Almost surely, 2^5627991 is an apocalyptic number.

5627991 is a deficient number, since it is larger than the sum of its proper divisors (1876001).

5627991 is a wasteful number, since it uses less digits than its factorization.

5627991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876000.

The product of its digits is 34020, while the sum is 39.

The square root of 5627991 is about 2372.3387194918. The cubic root of 5627991 is about 177.8761816179.

The spelling of 5627991 in words is "five million, six hundred twenty-seven thousand, nine hundred ninety-one".