820069297 has 8 divisors (see below), whose sum is σ = 840196544. Its totient is φ = 799990128.

The previous prime is 820069291. The next prime is 820069309. The reversal of 820069297 is 792960028.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 820069297 - 2⁷ = 820069169 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (820069291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23803 + ... + 46975.

It is an arithmetic number, because the mean of its divisors is an integer number (105024568).

Almost surely, 2^820069297 is an apocalyptic number.

It is an amenable number.

820069297 is a deficient number, since it is larger than the sum of its proper divisors (20127247).

820069297 is a wasteful number, since it uses less digits than its factorization.

820069297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24039.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 820069297 is about 28636.8520790956. The cubic root of 820069297 is about 936.0165279577.

The spelling of 820069297 in words is "eight hundred twenty million, sixty-nine thousand, two hundred ninety-seven".