1111899941 has 2 divisors, whose sum is σ = 1111899942. Its totient is φ = 1111899940.

The previous prime is 1111899923. The next prime is 1111899949. The reversal of 1111899941 is 1499981111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 980316100 + 131583841 = 31310^2 + 11471^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111899941 - 2²² = 1107705637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111899892 and 1111899901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1111899949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555949970 + 555949971.

It is an arithmetic number, because the mean of its divisors is an integer number (555949971).

Almost surely, 2^1111899941 is an apocalyptic number.

It is an amenable number.

1111899941 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111899941 is an equidigital number, since it uses as much as digits as its factorization.

1111899941 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 44.

The square root of 1111899941 is about 33345.1636823093. The cubic root of 1111899941 is about 1035.9892184569.

The spelling of 1111899941 in words is "one billion, one hundred eleven million, eight hundred ninety-nine thousand, nine hundred forty-one".