821994062 has 4 divisors (see below), whose sum is σ = 1232991096. Its totient is φ = 410997030.

The previous prime is 821994029. The next prime is 821994071. The reversal of 821994062 is 260499128.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205498514 + ... + 205498517.

It is an arithmetic number, because the mean of its divisors is an integer number (308247774).

Almost surely, 2^821994062 is an apocalyptic number.

821994062 is a deficient number, since it is larger than the sum of its proper divisors (410997034).

821994062 is a wasteful number, since it uses less digits than its factorization.

821994062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410997033.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 821994062 is about 28670.4388177091. The cubic root of 821994062 is about 936.7482564378.

The spelling of 821994062 in words is "eight hundred twenty-one million, nine hundred ninety-four thousand, sixty-two".