5517991 has 2 divisors, whose sum is σ = 5517992. Its totient is φ = 5517990.

The previous prime is 5517977. The next prime is 5518001. The reversal of 5517991 is 1997155.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5517991 - 2⁵ = 5517959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5517991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5517901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2758995 + 2758996.

It is an arithmetic number, because the mean of its divisors is an integer number (2758996).

Almost surely, 2^5517991 is an apocalyptic number.

5517991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5517991 is an equidigital number, since it uses as much as digits as its factorization.

5517991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14175, while the sum is 37.

The square root of 5517991 is about 2349.0404423934. The cubic root of 5517991 is about 176.7096754590.

The spelling of 5517991 in words is "five million, five hundred seventeen thousand, nine hundred ninety-one".