1114777891 has 2 divisors, whose sum is σ = 1114777892. Its totient is φ = 1114777890.

The previous prime is 1114777889. The next prime is 1114777999. The reversal of 1114777891 is 1987774111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1114777891 - 2¹ = 1114777889 is a prime.

Together with 1114777889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1114777871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 557388945 + 557388946.

It is an arithmetic number, because the mean of its divisors is an integer number (557388946).

Almost surely, 2^1114777891 is an apocalyptic number.

1114777891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1114777891 is an equidigital number, since it uses as much as digits as its factorization.

1114777891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98784, while the sum is 46.

The square root of 1114777891 is about 33388.2897285860. The cubic root of 1114777891 is about 1036.8822713825.

The spelling of 1114777891 in words is "one billion, one hundred fourteen million, seven hundred seventy-seven thousand, eight hundred ninety-one".