83623609 has 4 divisors (see below), whose sum is σ = 84090960. Its totient is φ = 83156260.

The previous prime is 83623597. The next prime is 83623613. The reversal of 83623609 is 90632638.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 83623609 - 2⁹ = 83623097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (83623679) 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, 233407 + ... + 233764.

It is an arithmetic number, because the mean of its divisors is an integer number (21022740).

Almost surely, 2^83623609 is an apocalyptic number.

It is an amenable number.

83623609 is a deficient number, since it is larger than the sum of its proper divisors (467351).

83623609 is a wasteful number, since it uses less digits than its factorization.

83623609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467350.

The product of its (nonzero) digits is 46656, while the sum is 37.

The square root of 83623609 is about 9144.5945235423. The cubic root of 83623609 is about 437.2968029458.

The spelling of 83623609 in words is "eighty-three million, six hundred twenty-three thousand, six hundred nine".