1234434391 has 2 divisors, whose sum is σ = 1234434392. Its totient is φ = 1234434390.

The previous prime is 1234434301. The next prime is 1234434469. The reversal of 1234434391 is 1934344321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1234434391 - 2⁷ = 1234434263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1234434301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617217195 + 617217196.

It is an arithmetic number, because the mean of its divisors is an integer number (617217196).

Almost surely, 2^1234434391 is an apocalyptic number.

1234434391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1234434391 is an equidigital number, since it uses as much as digits as its factorization.

1234434391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 34.

The square root of 1234434391 is about 35134.5185110028. The cubic root of 1234434391 is about 1072.7273106868.

The spelling of 1234434391 in words is "one billion, two hundred thirty-four million, four hundred thirty-four thousand, three hundred ninety-one".