434053821 has 4 divisors (see below), whose sum is σ = 578738432. Its totient is φ = 289369212.

The previous prime is 434053819. The next prime is 434053831. The reversal of 434053821 is 128350434.

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 not a de Polignac number, because 434053821 - 2¹ = 434053819 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 (434053831) 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, 72342301 + ... + 72342306.

It is an arithmetic number, because the mean of its divisors is an integer number (144684608).

Almost surely, 2^434053821 is an apocalyptic number.

It is an amenable number.

434053821 is a deficient number, since it is larger than the sum of its proper divisors (144684611).

434053821 is a wasteful number, since it uses less digits than its factorization.

434053821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144684610.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 434053821 is about 20833.9583612908. The cubic root of 434053821 is about 757.1487236200.

The spelling of 434053821 in words is "four hundred thirty-four million, fifty-three thousand, eight hundred twenty-one".