1227813641 has 2 divisors, whose sum is σ = 1227813642. Its totient is φ = 1227813640.

The previous prime is 1227813619. The next prime is 1227813677. The reversal of 1227813641 is 1463187221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1127012041 + 100801600 = 33571^2 + 10040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1227813641 - 2²² = 1223619337 is a prime.

It is not a weakly prime, because it can be changed into another prime (1227816641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613906820 + 613906821.

It is an arithmetic number, because the mean of its divisors is an integer number (613906821).

Almost surely, 2^1227813641 is an apocalyptic number.

It is an amenable number.

1227813641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1227813641 is an equidigital number, since it uses as much as digits as its factorization.

1227813641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 1227813641 is about 35040.1718175011. The cubic root of 1227813641 is about 1070.8060543464.

The spelling of 1227813641 in words is "one billion, two hundred twenty-seven million, eight hundred thirteen thousand, six hundred forty-one".