434140391 has 2 divisors, whose sum is σ = 434140392. Its totient is φ = 434140390.

The previous prime is 434140379. The next prime is 434140423. The reversal of 434140391 is 193041434.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 434140391 - 2²² = 429946087 is a prime.

It is equal to p_23056085 and since 434140391 and 23056085 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434142391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217070195 + 217070196.

It is an arithmetic number, because the mean of its divisors is an integer number (217070196).

Almost surely, 2^434140391 is an apocalyptic number.

434140391 is a deficient number, since it is larger than the sum of its proper divisors (1).

434140391 is an equidigital number, since it uses as much as digits as its factorization.

434140391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 434140391 is about 20836.0358753771. The cubic root of 434140391 is about 757.1990568618.

The spelling of 434140391 in words is "four hundred thirty-four million, one hundred forty thousand, three hundred ninety-one".