534661821 has 12 divisors (see below), whose sum is σ = 772824000. Its totient is φ = 356194440.

The previous prime is 534661819. The next prime is 534661823. The reversal of 534661821 is 128166435.

It is a happy number.

534661821 is a `hidden beast` number, since 5 + 34 + 6 + 618 + 2 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (534661819) and next prime (534661823).

It is not a de Polignac number, because 534661821 - 2¹ = 534661819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (534661823) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6325 + ... + 33306.

It is an arithmetic number, because the mean of its divisors is an integer number (64402000).

Almost surely, 2^534661821 is an apocalyptic number.

It is an amenable number.

534661821 is a deficient number, since it is larger than the sum of its proper divisors (238162179).

534661821 is a wasteful number, since it uses less digits than its factorization.

534661821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41136 (or 41133 counting only the distinct ones).

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

The square root of 534661821 is about 23122.7554802623. The cubic root of 534661821 is about 811.6330519627.

The spelling of 534661821 in words is "five hundred thirty-four million, six hundred sixty-one thousand, eight hundred twenty-one".