1111899949 has 2 divisors, whose sum is σ = 1111899950. Its totient is φ = 1111899948.

The previous prime is 1111899941. The next prime is 1111899961. The reversal of 1111899949 is 9499981111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109889225 + 2010724 = 33315^2 + 1418^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111899949 - 2³ = 1111899941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111899896 and 1111899905.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111899941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555949974 + 555949975.

It is an arithmetic number, because the mean of its divisors is an integer number (555949975).

Almost surely, 2^1111899949 is an apocalyptic number.

It is an amenable number.

1111899949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111899949 is an equidigital number, since it uses as much as digits as its factorization.

1111899949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 52.

The square root of 1111899949 is about 33345.1638022667. The cubic root of 1111899949 is about 1035.9892209415.

The spelling of 1111899949 in words is "one billion, one hundred eleven million, eight hundred ninety-nine thousand, nine hundred forty-nine".