5119999991 has 2 divisors, whose sum is σ = 5119999992. Its totient is φ = 5119999990.

The previous prime is 5119999987. The next prime is 5120000063. The reversal of 5119999991 is 1999999115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5119999991 - 2² = 5119999987 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5119999931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2559999995 + 2559999996.

It is an arithmetic number, because the mean of its divisors is an integer number (2559999996).

Almost surely, 2^5119999991 is an apocalyptic number.

5119999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

5119999991 is an equidigital number, since it uses as much as digits as its factorization.

5119999991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2657205, while the sum is 62.

The square root of 5119999991 is about 71554.1752171039. The cubic root of 5119999991 is about 1723.5477510156.

It can be divided in two parts, 511999999 and 1, that added together give a cube (512000000 = 800³).

The spelling of 5119999991 in words is "five billion, one hundred nineteen million, nine hundred ninety-nine thousand, nine hundred ninety-one".