1103019991 has 2 divisors, whose sum is σ = 1103019992. Its totient is φ = 1103019990.

The previous prime is 1103019979. The next prime is 1103020001. The reversal of 1103019991 is 1999103011.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1103019991 - 2²³ = 1094631383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1103019971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 551509995 + 551509996.

It is an arithmetic number, because the mean of its divisors is an integer number (551509996).

Almost surely, 2^1103019991 is an apocalyptic number.

1103019991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1103019991 is an equidigital number, since it uses as much as digits as its factorization.

1103019991 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1103019991 is about 33211.7447750039. The cubic root of 1103019991 is about 1033.2239421372.

The spelling of 1103019991 in words is "one billion, one hundred three million, nineteen thousand, nine hundred ninety-one".