1111999973 has 12 divisors (see below), whose sum is σ = 1295682732. Its totient is φ = 951572160.

The previous prime is 1111999969. The next prime is 1111999979. The reversal of 1111999973 is 3799991111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17581249 + 1094418724 = 4193^2 + 33082^2 .

It is not a de Polignac number, because 1111999973 - 2² = 1111999969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111999979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11843 + ... + 48623.

It is an arithmetic number, because the mean of its divisors is an integer number (107973561).

Almost surely, 2^1111999973 is an apocalyptic number.

It is an amenable number.

1111999973 is a deficient number, since it is larger than the sum of its proper divisors (183682759).

1111999973 is an equidigital number, since it uses as much as digits as its factorization.

1111999973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37412 (or 37405 counting only the distinct ones).

The product of its digits is 137781, while the sum is 50.

The square root of 1111999973 is about 33346.6635962280. The cubic root of 1111999973 is about 1036.0202850910.

The spelling of 1111999973 in words is "one billion, one hundred eleven million, nine hundred ninety-nine thousand, nine hundred seventy-three".