1226698381 has 2 divisors, whose sum is σ = 1226698382. Its totient is φ = 1226698380.

The previous prime is 1226698357. The next prime is 1226698423. The reversal of 1226698381 is 1838966221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1014995881 + 211702500 = 31859^2 + 14550^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226698381 - 2¹¹ = 1226696333 is a prime.

It is a super-2 number, since 2×1226698381² = 3009577835896042322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226698301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613349190 + 613349191.

It is an arithmetic number, because the mean of its divisors is an integer number (613349191).

Almost surely, 2^1226698381 is an apocalyptic number.

It is an amenable number.

1226698381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226698381 is an equidigital number, since it uses as much as digits as its factorization.

1226698381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 46.

The square root of 1226698381 is about 35024.2541819237. The cubic root of 1226698381 is about 1070.4817410339.

The spelling of 1226698381 in words is "one billion, two hundred twenty-six million, six hundred ninety-eight thousand, three hundred eighty-one".