1011109993 has 2 divisors, whose sum is σ = 1011109994. Its totient is φ = 1011109992.

The previous prime is 1011109973. The next prime is 1011109997. The reversal of 1011109993 is 3999011101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 507691024 + 503418969 = 22532^2 + 22437^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011109993 - 2¹³ = 1011101801 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011109997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505554996 + 505554997.

It is an arithmetic number, because the mean of its divisors is an integer number (505554997).

Almost surely, 2^1011109993 is an apocalyptic number.

It is an amenable number.

1011109993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011109993 is an equidigital number, since it uses as much as digits as its factorization.

1011109993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 34.

The square root of 1011109993 is about 31797.9557990761. The cubic root of 1011109993 is about 1003.6897003675.

The spelling of 1011109993 in words is "one billion, eleven million, one hundred nine thousand, nine hundred ninety-three".