434590021 has 4 divisors (see below), whose sum is σ = 457463200. Its totient is φ = 411716844.

The previous prime is 434590019. The next prime is 434590043. The reversal of 434590021 is 120095434.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 434590021 - 2¹ = 434590019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434590061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11436561 + ... + 11436598.

It is an arithmetic number, because the mean of its divisors is an integer number (114365800).

Almost surely, 2^434590021 is an apocalyptic number.

It is an amenable number.

434590021 is a deficient number, since it is larger than the sum of its proper divisors (22873179).

434590021 is a wasteful number, since it uses less digits than its factorization.

434590021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22873178.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 434590021 is about 20846.8228034873. The cubic root of 434590021 is about 757.4603716738.

The spelling of 434590021 in words is "four hundred thirty-four million, five hundred ninety thousand, twenty-one".