820323969 has 8 divisors (see below), whose sum is σ = 1099262400. Its totient is φ = 544134096.

The previous prime is 820323949. The next prime is 820323971. The reversal of 820323969 is 969323028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 820323969 - 2⁵ = 820323937 is a prime.

It is a super-2 number, since 2×820323969² = 1345862828231825922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 820323969.

It is not an unprimeable number, because it can be changed into a prime (820323949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 686442 + ... + 687635.

It is an arithmetic number, because the mean of its divisors is an integer number (137407800).

Almost surely, 2^820323969 is an apocalyptic number.

It is an amenable number.

820323969 is a deficient number, since it is larger than the sum of its proper divisors (278938431).

820323969 is a wasteful number, since it uses less digits than its factorization.

820323969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1374279.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 820323969 is about 28641.2983120528. The cubic root of 820323969 is about 936.1134110424.

The spelling of 820323969 in words is "eight hundred twenty million, three hundred twenty-three thousand, nine hundred sixty-nine".