1213529899 has 2 divisors, whose sum is σ = 1213529900. Its totient is φ = 1213529898.

The previous prime is 1213529861. The next prime is 1213529903. The reversal of 1213529899 is 9989253121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1213529899 - 2¹¹ = 1213527851 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213529299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606764949 + 606764950.

It is an arithmetic number, because the mean of its divisors is an integer number (606764950).

Almost surely, 2^1213529899 is an apocalyptic number.

1213529899 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213529899 is an equidigital number, since it uses as much as digits as its factorization.

1213529899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 49.

The square root of 1213529899 is about 34835.7560417454. The cubic root of 1213529899 is about 1066.6374479084.

The spelling of 1213529899 in words is "one billion, two hundred thirteen million, five hundred twenty-nine thousand, eight hundred ninety-nine".