1223631361 has 2 divisors, whose sum is σ = 1223631362. Its totient is φ = 1223631360.

The previous prime is 1223631341. The next prime is 1223631371. The reversal of 1223631361 is 1631363221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1092963600 + 130667761 = 33060^2 + 11431^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1223631361 is a prime.

It is a super-3 number, since 3×1223631361³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (1223631301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611815680 + 611815681.

It is an arithmetic number, because the mean of its divisors is an integer number (611815681).

Almost surely, 2^1223631361 is an apocalyptic number.

It is an amenable number.

1223631361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223631361 is an equidigital number, since it uses as much as digits as its factorization.

1223631361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 28.

The square root of 1223631361 is about 34980.4425500879. The cubic root of 1223631361 is about 1069.5888486429.

Adding to 1223631361 its reverse (1631363221), we get a palindrome (2854994582).

The spelling of 1223631361 in words is "one billion, two hundred twenty-three million, six hundred thirty-one thousand, three hundred sixty-one".