1216732929 has 8 divisors (see below), whose sum is σ = 1623562752. Its totient is φ = 810529200.

The previous prime is 1216732921. The next prime is 1216732949. The reversal of 1216732929 is 9292376121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1216732929 - 2³ = 1216732921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1216732921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151969 + ... + 159774.

It is an arithmetic number, because the mean of its divisors is an integer number (202945344).

Almost surely, 2^1216732929 is an apocalyptic number.

It is an amenable number.

1216732929 is a deficient number, since it is larger than the sum of its proper divisors (406829823).

1216732929 is a wasteful number, since it uses less digits than its factorization.

1216732929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313047.

The product of its digits is 81648, while the sum is 42.

The square root of 1216732929 is about 34881.6990555219. The cubic root of 1216732929 is about 1067.5750625753.

The spelling of 1216732929 in words is "one billion, two hundred sixteen million, seven hundred thirty-two thousand, nine hundred twenty-nine".