1122179491 has 2 divisors, whose sum is σ = 1122179492. Its totient is φ = 1122179490.

The previous prime is 1122179489. The next prime is 1122179519. The reversal of 1122179491 is 1949712211.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1122179491 - 2¹ = 1122179489 is a prime.

Together with 1122179489, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1122179491.

It is not a weakly prime, because it can be changed into another prime (1122179431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561089745 + 561089746.

It is an arithmetic number, because the mean of its divisors is an integer number (561089746).

Almost surely, 2^1122179491 is an apocalyptic number.

1122179491 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122179491 is an equidigital number, since it uses as much as digits as its factorization.

1122179491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 37.

The square root of 1122179491 is about 33498.9476103355. The cubic root of 1122179491 is about 1039.1720144910.

The spelling of 1122179491 in words is "one billion, one hundred twenty-two million, one hundred seventy-nine thousand, four hundred ninety-one".