1213529889 has 16 divisors (see below), whose sum is σ = 1900914624. Its totient is φ = 678897600.

The previous prime is 1213529861. The next prime is 1213529899. The reversal of 1213529889 is 9889253121.

It is not a de Polignac number, because 1213529889 - 2⁷ = 1213529761 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1213529899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1413942 + ... + 1414799.

It is an arithmetic number, because the mean of its divisors is an integer number (118807164).

Almost surely, 2^1213529889 is an apocalyptic number.

It is an amenable number.

1213529889 is a deficient number, since it is larger than the sum of its proper divisors (687384735).

1213529889 is a wasteful number, since it uses less digits than its factorization.

1213529889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828768.

The product of its digits is 311040, while the sum is 48.

The square root of 1213529889 is about 34835.7558982147. The cubic root of 1213529889 is about 1066.6374449785.

It can be divided in two parts, 12135 and 29889, that added together give a palindrome (42024).

The spelling of 1213529889 in words is "one billion, two hundred thirteen million, five hundred twenty-nine thousand, eight hundred eighty-nine".