820090351 has 4 divisors (see below), whose sum is σ = 823009104. Its totient is φ = 817171600.

The previous prime is 820090339. The next prime is 820090363. The reversal of 820090351 is 153090028.

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

It is an interprime number because it is at equal distance from previous prime (820090339) and next prime (820090363).

It is a cyclic number.

It is not a de Polignac number, because 820090351 - 2¹⁵ = 820057583 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 (820091351) 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, 1458955 + ... + 1459516.

It is an arithmetic number, because the mean of its divisors is an integer number (205752276).

Almost surely, 2^820090351 is an apocalyptic number.

820090351 is a deficient number, since it is larger than the sum of its proper divisors (2918753).

820090351 is a wasteful number, since it uses less digits than its factorization.

820090351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918752.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 820090351 is about 28637.2196799899. The cubic root of 820090351 is about 936.0245381439.

The spelling of 820090351 in words is "eight hundred twenty million, ninety thousand, three hundred fifty-one".