434091521 has 2 divisors, whose sum is σ = 434091522. Its totient is φ = 434091520.

The previous prime is 434091479. The next prime is 434091523. The reversal of 434091521 is 125190434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431808400 + 2283121 = 20780^2 + 1511^2 .

It is a cyclic number.

It is not a de Polignac number, because 434091521 - 2⁶ = 434091457 is a prime.

Together with 434091523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (434091523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217045760 + 217045761.

It is an arithmetic number, because the mean of its divisors is an integer number (217045761).

Almost surely, 2^434091521 is an apocalyptic number.

It is an amenable number.

434091521 is a deficient number, since it is larger than the sum of its proper divisors (1).

434091521 is an equidigital number, since it uses as much as digits as its factorization.

434091521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 434091521 is about 20834.8631145011. The cubic root of 434091521 is about 757.1706438513.

The spelling of 434091521 in words is "four hundred thirty-four million, ninety-one thousand, five hundred twenty-one".