5185981919 has 2 divisors, whose sum is σ = 5185981920. Its totient is φ = 5185981918.

The previous prime is 5185981841. The next prime is 5185981963. The reversal of 5185981919 is 9191895815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5185981919 - 2⁸ = 5185981663 is a prime.

It is a super-2 number, since 2×5185981919² = 53788816928389845122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5185981819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2592990959 + 2592990960.

It is an arithmetic number, because the mean of its divisors is an integer number (2592990960).

Almost surely, 2^5185981919 is an apocalyptic number.

5185981919 is a deficient number, since it is larger than the sum of its proper divisors (1).

5185981919 is an equidigital number, since it uses as much as digits as its factorization.

5185981919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 56.

The square root of 5185981919 is about 72013.7620111601. The cubic root of 5185981919 is about 1730.9200135071.

The spelling of 5185981919 in words is "five billion, one hundred eighty-five million, nine hundred eighty-one thousand, nine hundred nineteen".