1232440399 has 2 divisors, whose sum is σ = 1232440400. Its totient is φ = 1232440398.

The previous prime is 1232440397. The next prime is 1232440421. The reversal of 1232440399 is 9930442321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1232440399 - 2¹ = 1232440397 is a prime.

Together with 1232440397, 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 (1232440397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616220199 + 616220200.

It is an arithmetic number, because the mean of its divisors is an integer number (616220200).

Almost surely, 2^1232440399 is an apocalyptic number.

1232440399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232440399 is an equidigital number, since it uses as much as digits as its factorization.

1232440399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 1232440399 is about 35106.1305045145. The cubic root of 1232440399 is about 1072.1494043339.

The spelling of 1232440399 in words is "one billion, two hundred thirty-two million, four hundred forty thousand, three hundred ninety-nine".