820889301 has 4 divisors (see below), whose sum is σ = 1094519072. Its totient is φ = 547259532.

The previous prime is 820889287. The next prime is 820889351. The reversal of 820889301 is 103988028.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 820889301 - 2¹⁴ = 820872917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 820889301.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820889351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136814881 + ... + 136814886.

It is an arithmetic number, because the mean of its divisors is an integer number (273629768).

Almost surely, 2^820889301 is an apocalyptic number.

It is an amenable number.

820889301 is a deficient number, since it is larger than the sum of its proper divisors (273629771).

820889301 is a wasteful number, since it uses less digits than its factorization.

820889301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273629770.

The product of its (nonzero) digits is 27648, while the sum is 39.

The square root of 820889301 is about 28651.1657878000. The cubic root of 820889301 is about 936.3284046964.

The spelling of 820889301 in words is "eight hundred twenty million, eight hundred eighty-nine thousand, three hundred one".