5991688693 has 2 divisors, whose sum is σ = 5991688694. Its totient is φ = 5991688692.

The previous prime is 5991688673. The next prime is 5991688697. The reversal of 5991688693 is 3968861995.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5651581329 + 340107364 = 75177^2 + 18442^2 .

It is a cyclic number.

It is not a de Polignac number, because 5991688693 - 2⁹ = 5991688181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5991688697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2995844346 + 2995844347.

It is an arithmetic number, because the mean of its divisors is an integer number (2995844347).

Almost surely, 2^5991688693 is an apocalyptic number.

It is an amenable number.

5991688693 is a deficient number, since it is larger than the sum of its proper divisors (1).

5991688693 is an equidigital number, since it uses as much as digits as its factorization.

5991688693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25194240, while the sum is 64.

The square root of 5991688693 is about 77405.9990762990. Note that the first 3 decimals coincide. The cubic root of 5991688693 is about 1816.2811691677.

The spelling of 5991688693 in words is "five billion, nine hundred ninety-one million, six hundred eighty-eight thousand, six hundred ninety-three".