11134431991 has 2 divisors, whose sum is σ = 11134431992. Its totient is φ = 11134431990.

The previous prime is 11134431967. The next prime is 11134432007. The reversal of 11134431991 is 19913443111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11134431991 - 2¹³ = 11134423799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11134431991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11134441991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5567215995 + 5567215996.

It is an arithmetic number, because the mean of its divisors is an integer number (5567215996).

Almost surely, 2^11134431991 is an apocalyptic number.

11134431991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11134431991 is an equidigital number, since it uses as much as digits as its factorization.

11134431991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 37.

The spelling of 11134431991 in words is "eleven billion, one hundred thirty-four million, four hundred thirty-one thousand, nine hundred ninety-one".