8523649 has 4 divisors (see below), whose sum is σ = 8529664. Its totient is φ = 8517636.

The previous prime is 8523643. The next prime is 8523659. The reversal of 8523649 is 9463258.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8523649 - 2⁵ = 8523617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8523643) 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, 424 + ... + 4150.

It is an arithmetic number, because the mean of its divisors is an integer number (2132416).

Almost surely, 2^8523649 is an apocalyptic number.

It is an amenable number.

8523649 is a deficient number, since it is larger than the sum of its proper divisors (6015).

8523649 is a wasteful number, since it uses less digits than its factorization.

8523649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6014.

The product of its digits is 51840, while the sum is 37.

The square root of 8523649 is about 2919.5289003536. The cubic root of 8523649 is about 204.2718485847.

The spelling of 8523649 in words is "eight million, five hundred twenty-three thousand, six hundred forty-nine".