65623523 has 4 divisors (see below), whose sum is σ = 74998320. Its totient is φ = 56248728.

The previous prime is 65623499. The next prime is 65623529. The reversal of 65623523 is 32532656.

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 65623523 - 2¹² = 65619427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 65623523.

It is not an unprimeable number, because it can be changed into a prime (65623529) 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, 4687388 + ... + 4687401.

It is an arithmetic number, because the mean of its divisors is an integer number (18749580).

Almost surely, 2^65623523 is an apocalyptic number.

65623523 is a deficient number, since it is larger than the sum of its proper divisors (9374797).

65623523 is an equidigital number, since it uses as much as digits as its factorization.

65623523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9374796.

The product of its digits is 32400, while the sum is 32.

The square root of 65623523 is about 8100.8347100777. The cubic root of 65623523 is about 403.3541354084.

The spelling of 65623523 in words is "sixty-five million, six hundred twenty-three thousand, five hundred twenty-three".