834555021 has 16 divisors (see below), whose sum is σ = 1125335808. Its totient is φ = 550088000.

The previous prime is 834554933. The next prime is 834555037. The reversal of 834555021 is 120555438.

It is a cyclic number.

It is not a de Polignac number, because 834555021 - 2⁷ = 834554893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (834555521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283660 + ... + 286586.

It is an arithmetic number, because the mean of its divisors is an integer number (70333488).

Almost surely, 2^834555021 is an apocalyptic number.

It is an amenable number.

834555021 is a deficient number, since it is larger than the sum of its proper divisors (290780787).

834555021 is a wasteful number, since it uses less digits than its factorization.

834555021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972.

The product of its (nonzero) digits is 24000, while the sum is 33.

The square root of 834555021 is about 28888.6659608920. The cubic root of 834555021 is about 941.4956651855.

The spelling of 834555021 in words is "eight hundred thirty-four million, five hundred fifty-five thousand, twenty-one".