5001999943 has 2 divisors, whose sum is σ = 5001999944. Its totient is φ = 5001999942.

The previous prime is 5001999923. The next prime is 5001999949. The reversal of 5001999943 is 3499991005.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5001999943 - 2¹³ = 5001991751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5001999949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500999971 + 2500999972.

It is an arithmetic number, because the mean of its divisors is an integer number (2500999972).

Almost surely, 2^5001999943 is an apocalyptic number.

5001999943 is a deficient number, since it is larger than the sum of its proper divisors (1).

5001999943 is an equidigital number, since it uses as much as digits as its factorization.

5001999943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 5001999943 is about 70724.8184373774. The cubic root of 5001999943 is about 1710.2039065806.

The spelling of 5001999943 in words is "five billion, one million, nine hundred ninety-nine thousand, nine hundred forty-three".