1199969138 has 16 divisors (see below), whose sum is σ = 1809444096. Its totient is φ = 596830080.

The previous prime is 1199969107. The next prime is 1199969159. The reversal of 1199969138 is 8319699911.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 325043 + ... + 328713.

It is an arithmetic number, because the mean of its divisors is an integer number (113090256).

Almost surely, 2^1199969138 is an apocalyptic number.

1199969138 is a deficient number, since it is larger than the sum of its proper divisors (609474958).

1199969138 is a wasteful number, since it uses less digits than its factorization.

1199969138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4489.

The product of its digits is 944784, while the sum is 56.

The square root of 1199969138 is about 34640.5706939132. The cubic root of 1199969138 is about 1062.6494591687.

The spelling of 1199969138 in words is "one billion, one hundred ninety-nine million, nine hundred sixty-nine thousand, one hundred thirty-eight".