1240234399 has 2 divisors, whose sum is σ = 1240234400. Its totient is φ = 1240234398.

The previous prime is 1240234349. The next prime is 1240234403. The reversal of 1240234399 is 9934320421.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1240234399 - 2²¹ = 1238137247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240234309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620117199 + 620117200.

It is an arithmetic number, because the mean of its divisors is an integer number (620117200).

Almost surely, 2^1240234399 is an apocalyptic number.

1240234399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240234399 is an equidigital number, since it uses as much as digits as its factorization.

1240234399 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1240234399 is about 35216.9618081969. The cubic root of 1240234399 is about 1074.4047612226.

The spelling of 1240234399 in words is "one billion, two hundred forty million, two hundred thirty-four thousand, three hundred ninety-nine".