320821898 has 4 divisors (see below), whose sum is σ = 481232850. Its totient is φ = 160410948.

The previous prime is 320821877. The next prime is 320821903. The reversal of 320821898 is 898128023.

It is a happy number.

320821898 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 312829969 + 7991929 = 17687^2 + 2827^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80205473 + ... + 80205476.

Almost surely, 2^320821898 is an apocalyptic number.

320821898 is a deficient number, since it is larger than the sum of its proper divisors (160410952).

320821898 is a wasteful number, since it uses less digits than its factorization.

320821898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160410951.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 320821898 is about 17911.5018354129. The cubic root of 320821898 is about 684.5754721199.

The spelling of 320821898 in words is "three hundred twenty million, eight hundred twenty-one thousand, eight hundred ninety-eight".