1122761891 has 2 divisors, whose sum is σ = 1122761892. Its totient is φ = 1122761890.

The previous prime is 1122761881. The next prime is 1122761921. The reversal of 1122761891 is 1981672211.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1122761891 - 2¹⁰ = 1122760867 is a prime.

It is not a weakly prime, because it can be changed into another prime (1122761881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561380945 + 561380946.

It is an arithmetic number, because the mean of its divisors is an integer number (561380946).

Almost surely, 2^1122761891 is an apocalyptic number.

1122761891 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122761891 is an equidigital number, since it uses as much as digits as its factorization.

1122761891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 38.

The square root of 1122761891 is about 33507.6392931522. The cubic root of 1122761891 is about 1039.3517567147.

The spelling of 1122761891 in words is "one billion, one hundred twenty-two million, seven hundred sixty-one thousand, eight hundred ninety-one".