434639813 has 2 divisors, whose sum is σ = 434639814. Its totient is φ = 434639812.

The previous prime is 434639797. The next prime is 434639819. The reversal of 434639813 is 318936434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 237714724 + 196925089 = 15418^2 + 14033^2 .

It is a cyclic number.

It is not a de Polignac number, because 434639813 - 2⁴ = 434639797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434639819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217319906 + 217319907.

It is an arithmetic number, because the mean of its divisors is an integer number (217319907).

Almost surely, 2^434639813 is an apocalyptic number.

It is an amenable number.

434639813 is a deficient number, since it is larger than the sum of its proper divisors (1).

434639813 is an equidigital number, since it uses as much as digits as its factorization.

434639813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 41.

The square root of 434639813 is about 20848.0170040222. The cubic root of 434639813 is about 757.4892985741.

The spelling of 434639813 in words is "four hundred thirty-four million, six hundred thirty-nine thousand, eight hundred thirteen".