1227396091 has 2 divisors, whose sum is σ = 1227396092. Its totient is φ = 1227396090.

The previous prime is 1227396043. The next prime is 1227396133. The reversal of 1227396091 is 1906937221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1227396091 - 2⁷ = 1227395963 is a prime.

It is not a weakly prime, because it can be changed into another prime (1227396011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613698045 + 613698046.

It is an arithmetic number, because the mean of its divisors is an integer number (613698046).

Almost surely, 2^1227396091 is an apocalyptic number.

1227396091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227396091 is an equidigital number, since it uses as much as digits as its factorization.

1227396091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 1227396091 is about 35034.2131494344. The cubic root of 1227396091 is about 1070.6846554231.

The spelling of 1227396091 in words is "one billion, two hundred twenty-seven million, three hundred ninety-six thousand, ninety-one".