1226497091 has 2 divisors, whose sum is σ = 1226497092. Its totient is φ = 1226497090.

The previous prime is 1226497037. The next prime is 1226497159. The reversal of 1226497091 is 1907946221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1226497091 - 2²² = 1222302787 is a prime.

It is a super-2 number, since 2×1226497091² = 3008590228462924562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1226497891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613248545 + 613248546.

It is an arithmetic number, because the mean of its divisors is an integer number (613248546).

Almost surely, 2^1226497091 is an apocalyptic number.

1226497091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226497091 is an equidigital number, since it uses as much as digits as its factorization.

1226497091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 1226497091 is about 35021.3804839272. The cubic root of 1226497091 is about 1070.4231857390.

The spelling of 1226497091 in words is "one billion, two hundred twenty-six million, four hundred ninety-seven thousand, ninety-one".