34549821 has 10 divisors (see below), whose sum is σ = 51611582. Its totient is φ = 23033160.

The previous prime is 34549819. The next prime is 34549843. The reversal of 34549821 is 12894543.

34549821 is a `hidden beast` number, since 34 + 549 + 82 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 29648025 + 4901796 = 5445^2 + 2214^2 .

It is not a de Polignac number, because 34549821 - 2¹ = 34549819 is a prime.

It is a super-2 number, since 2×34549821² = 2387380262264082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34549811) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 213190 + ... + 213351.

Almost surely, 2^34549821 is an apocalyptic number.

It is an amenable number.

34549821 is a deficient number, since it is larger than the sum of its proper divisors (17061761).

34549821 is an equidigital number, since it uses as much as digits as its factorization.

34549821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426553 (or 426544 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 34549821 is about 5877.9095773923. The cubic root of 34549821 is about 325.6981316187.

The spelling of 34549821 in words is "thirty-four million, five hundred forty-nine thousand, eight hundred twenty-one".