1999227613 has 2 divisors, whose sum is σ = 1999227614. Its totient is φ = 1999227612.

The previous prime is 1999227599. The next prime is 1999227647. The reversal of 1999227613 is 3167229991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1893816324 + 105411289 = 43518^2 + 10267^2 .

It is a cyclic number.

It is not a de Polignac number, because 1999227613 - 2¹³ = 1999219421 is a prime.

It is a super-2 number, since 2×1999227613² = 7993822097163355538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1999227313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 999613806 + 999613807.

It is an arithmetic number, because the mean of its divisors is an integer number (999613807).

Almost surely, 2^1999227613 is an apocalyptic number.

It is an amenable number.

1999227613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1999227613 is an equidigital number, since it uses as much as digits as its factorization.

1999227613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 49.

The square root of 1999227613 is about 44712.7231669018. The cubic root of 1999227613 is about 1259.7588379047.

The spelling of 1999227613 in words is "one billion, nine hundred ninety-nine million, two hundred twenty-seven thousand, six hundred thirteen".