8520069 has 4 divisors (see below), whose sum is σ = 11360096. Its totient is φ = 5680044.

The previous prime is 8520041. The next prime is 8520079. The reversal of 8520069 is 9600258.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 8520069 - 2⁸ = 8519813 is a prime.

It is a super-2 number, since 2×8520069² = 145183151529522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8520079) 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, 1420009 + ... + 1420014.

It is an arithmetic number, because the mean of its divisors is an integer number (2840024).

Almost surely, 2^8520069 is an apocalyptic number.

It is an amenable number.

8520069 is a deficient number, since it is larger than the sum of its proper divisors (2840027).

8520069 is a wasteful number, since it uses less digits than its factorization.

8520069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840026.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 8520069 is about 2918.9157233466. The cubic root of 8520069 is about 204.2432459825.

The spelling of 8520069 in words is "eight million, five hundred twenty thousand, sixty-nine".