5061000991 has 2 divisors, whose sum is σ = 5061000992. Its totient is φ = 5061000990.

The previous prime is 5061000953. The next prime is 5061001003. The reversal of 5061000991 is 1990001605.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5061000991 - 2⁷ = 5061000863 is a prime.

It is a super-2 number, since 2×5061000991² = 51227462061805964162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5061000941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2530500495 + 2530500496.

It is an arithmetic number, because the mean of its divisors is an integer number (2530500496).

Almost surely, 2^5061000991 is an apocalyptic number.

5061000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5061000991 is an equidigital number, since it uses as much as digits as its factorization.

5061000991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 31.

The square root of 5061000991 is about 71140.7126123994. The cubic root of 5061000991 is about 1716.9018718455.

The spelling of 5061000991 in words is "five billion, sixty-one million, nine hundred ninety-one", and thus it is an aban number.