890674821 has 6 divisors (see below), whose sum is σ = 1286530310. Its totient is φ = 593783208.

The previous prime is 890674817. The next prime is 890674843. The reversal of 890674821 is 128476098.

890674821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 857669796 + 33005025 = 29286^2 + 5745^2 .

It is not a de Polignac number, because 890674821 - 2² = 890674817 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 (890674021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 49481926 + ... + 49481943.

Almost surely, 2^890674821 is an apocalyptic number.

It is an amenable number.

890674821 is a deficient number, since it is larger than the sum of its proper divisors (395855489).

890674821 is a wasteful number, since it uses less digits than its factorization.

890674821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98963875 (or 98963872 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 890674821 is about 29844.1756629330. The cubic root of 890674821 is about 962.1432227116.

The spelling of 890674821 in words is "eight hundred ninety million, six hundred seventy-four thousand, eight hundred twenty-one".