1234921439 has 2 divisors, whose sum is σ = 1234921440. Its totient is φ = 1234921438.

The previous prime is 1234921427. The next prime is 1234921459. The reversal of 1234921439 is 9341294321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1234921439 - 2⁴ = 1234921423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1234921409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617460719 + 617460720.

It is an arithmetic number, because the mean of its divisors is an integer number (617460720).

Almost surely, 2^1234921439 is an apocalyptic number.

1234921439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234921439 is an equidigital number, since it uses as much as digits as its factorization.

1234921439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46656, while the sum is 38.

The square root of 1234921439 is about 35141.4490167950. The cubic root of 1234921439 is about 1072.8683742099.

The spelling of 1234921439 in words is "one billion, two hundred thirty-four million, nine hundred twenty-one thousand, four hundred thirty-nine".