1999524913 has 2 divisors, whose sum is σ = 1999524914. Its totient is φ = 1999524912.

The previous prime is 1999524899. The next prime is 1999524931. The reversal of 1999524913 is 3194259991.

Together with next prime (1999524931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1319723584 + 679801329 = 36328^2 + 26073^2 .

It is a cyclic number.

It is not a de Polignac number, because 1999524913 - 2²⁹ = 1462654001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1999521913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999762456 + 999762457.

It is an arithmetic number, because the mean of its divisors is an integer number (999762457).

Almost surely, 2^1999524913 is an apocalyptic number.

It is an amenable number.

1999524913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999524913 is an equidigital number, since it uses as much as digits as its factorization.

1999524913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 52.

The square root of 1999524913 is about 44716.0476003862. The cubic root of 1999524913 is about 1259.8212799759.

The spelling of 1999524913 in words is "one billion, nine hundred ninety-nine million, five hundred twenty-four thousand, nine hundred thirteen".