1111999523 has 2 divisors, whose sum is σ = 1111999524. Its totient is φ = 1111999522.

The previous prime is 1111999513. The next prime is 1111999531. The reversal of 1111999523 is 3259991111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1111999523 - 2⁴ = 1111999507 is a prime.

It is not a weakly prime, because it can be changed into another prime (1111999513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555999761 + 555999762.

It is an arithmetic number, because the mean of its divisors is an integer number (555999762).

Almost surely, 2^1111999523 is an apocalyptic number.

1111999523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111999523 is an equidigital number, since it uses as much as digits as its factorization.

1111999523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 41.

The square root of 1111999523 is about 33346.6568489257. The cubic root of 1111999523 is about 1036.0201453400.

The spelling of 1111999523 in words is "one billion, one hundred eleven million, nine hundred ninety-nine thousand, five hundred twenty-three".