1232621653 has 2 divisors, whose sum is σ = 1232621654. Its totient is φ = 1232621652.

The previous prime is 1232621651. The next prime is 1232621657. The reversal of 1232621653 is 3561262321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1154776324 + 77845329 = 33982^2 + 8823^2 .

It is a cyclic number.

It is not a de Polignac number, because 1232621653 - 2¹ = 1232621651 is a prime.

It is a super-2 number, since 2×1232621653² = 3038712278888904818, which contains 22 as substring.

Together with 1232621651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1232621651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616310826 + 616310827.

It is an arithmetic number, because the mean of its divisors is an integer number (616310827).

Almost surely, 2^1232621653 is an apocalyptic number.

It is an amenable number.

1232621653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232621653 is an equidigital number, since it uses as much as digits as its factorization.

1232621653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 1232621653 is about 35108.7119245352. The cubic root of 1232621653 is about 1072.2019618024.

Adding to 1232621653 its reverse (3561262321), we get a palindrome (4793883974).

The spelling of 1232621653 in words is "one billion, two hundred thirty-two million, six hundred twenty-one thousand, six hundred fifty-three".