1213539159 has 16 divisors (see below), whose sum is σ = 1851046400. Its totient is φ = 692759520.

The previous prime is 1213539149. The next prime is 1213539167. The reversal of 1213539159 is 9519353121.

It is not a de Polignac number, because 1213539159 - 2⁴ = 1213539143 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213539149) 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, 6859 + ... + 49740.

It is an arithmetic number, because the mean of its divisors is an integer number (115690400).

Almost surely, 2^1213539159 is an apocalyptic number.

1213539159 is a deficient number, since it is larger than the sum of its proper divisors (637507241).

1213539159 is a wasteful number, since it uses less digits than its factorization.

1213539159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57630.

The product of its digits is 36450, while the sum is 39.

The square root of 1213539159 is about 34835.8889509081. Note that the first 3 decimals coincide. The cubic root of 1213539159 is about 1066.6401609408.

The spelling of 1213539159 in words is "one billion, two hundred thirteen million, five hundred thirty-nine thousand, one hundred fifty-nine".