1111948213 has 4 divisors (see below), whose sum is σ = 1116562348. Its totient is φ = 1107334080.

The previous prime is 1111948193. The next prime is 1111948219. The reversal of 1111948213 is 3128491111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3128491111 = 163 ⋅19193197.

It can be written as a sum of positive squares in 2 ways, for example, as 976062564 + 135885649 = 31242^2 + 11657^2 .

It is a cyclic number.

It is not a de Polignac number, because 1111948213 - 2⁹ = 1111947701 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 (1111948219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2306706 + ... + 2307187.

It is an arithmetic number, because the mean of its divisors is an integer number (279140587).

Almost surely, 2^1111948213 is an apocalyptic number.

It is an amenable number.

1111948213 is a deficient number, since it is larger than the sum of its proper divisors (4614135).

1111948213 is an equidigital number, since it uses as much as digits as its factorization.

1111948213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4614134.

The product of its digits is 1728, while the sum is 31.

The square root of 1111948213 is about 33345.8874975611. The cubic root of 1111948213 is about 1036.0042103778.

The spelling of 1111948213 in words is "one billion, one hundred eleven million, nine hundred forty-eight thousand, two hundred thirteen".