1111791851 has 2 divisors, whose sum is σ = 1111791852. Its totient is φ = 1111791850.

The previous prime is 1111791839. The next prime is 1111791869. The reversal of 1111791851 is 1581971111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1111791851 - 2²⁶ = 1044682987 is a prime.

It is a super-2 number, since 2×1111791851² = 2472162239900012402, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1111791881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555895925 + 555895926.

It is an arithmetic number, because the mean of its divisors is an integer number (555895926).

Almost surely, 2^1111791851 is an apocalyptic number.

1111791851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1111791851 is an equidigital number, since it uses as much as digits as its factorization.

1111791851 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 35.

The square root of 1111791851 is about 33343.5428681476. The cubic root of 1111791851 is about 1035.9556471797.

The spelling of 1111791851 in words is "one billion, one hundred eleven million, seven hundred ninety-one thousand, eight hundred fifty-one".