1239099812 has 12 divisors (see below), whose sum is σ = 2168824560. Its totient is φ = 619435656.

The previous prime is 1239099767. The next prime is 1239099817. The reversal of 1239099812 is 2189909321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1239099817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262 + ... + 49797.

It is an arithmetic number, because the mean of its divisors is an integer number (180735380).

Almost surely, 2^1239099812 is an apocalyptic number.

It is an amenable number.

1239099812 is a deficient number, since it is larger than the sum of its proper divisors (929724748).

1239099812 is a wasteful number, since it uses less digits than its factorization.

1239099812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57130 (or 57128 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 1239099812 is about 35200.8495920198. The cubic root of 1239099812 is about 1074.0770334998.

The spelling of 1239099812 in words is "one billion, two hundred thirty-nine million, ninety-nine thousand, eight hundred twelve".