820053959 has 4 divisors (see below), whose sum is σ = 820955040. Its totient is φ = 819152880.

The previous prime is 820053931. The next prime is 820054013. The reversal of 820053959 is 959350028.

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

It is a cyclic number.

It is not a de Polignac number, because 820053959 - 2¹⁶ = 819988423 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 (820053659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449174 + ... + 450995.

It is an arithmetic number, because the mean of its divisors is an integer number (205238760).

Almost surely, 2^820053959 is an apocalyptic number.

820053959 is a deficient number, since it is larger than the sum of its proper divisors (901081).

820053959 is an equidigital number, since it uses as much as digits as its factorization.

820053959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 901080.

The product of its (nonzero) digits is 97200, while the sum is 41.

The square root of 820053959 is about 28636.5842760620. The cubic root of 820053959 is about 936.0106923895.

The spelling of 820053959 in words is "eight hundred twenty million, fifty-three thousand, nine hundred fifty-nine".