820550695 has 4 divisors (see below), whose sum is σ = 984660840. Its totient is φ = 656440552.

The previous prime is 820550693. The next prime is 820550723. The reversal of 820550695 is 596055028.

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 820550695 - 2¹ = 820550693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820550693) 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, 82055065 + ... + 82055074.

It is an arithmetic number, because the mean of its divisors is an integer number (246165210).

Almost surely, 2^820550695 is an apocalyptic number.

820550695 is a deficient number, since it is larger than the sum of its proper divisors (164110145).

820550695 is a wasteful number, since it uses less digits than its factorization.

820550695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164110144.

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 820550695 is about 28645.2560644865. The cubic root of 820550695 is about 936.1996459556.

The spelling of 820550695 in words is "eight hundred twenty million, five hundred fifty thousand, six hundred ninety-five".