123577221 has 4 divisors (see below), whose sum is σ = 164769632. Its totient is φ = 82384812.

The previous prime is 123577219. The next prime is 123577231. The reversal of 123577221 is 122775321.

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 123577221 - 2¹ = 123577219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123577231) 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, 20596201 + ... + 20596206.

It is an arithmetic number, because the mean of its divisors is an integer number (41192408).

Almost surely, 2^123577221 is an apocalyptic number.

It is an amenable number.

123577221 is a deficient number, since it is larger than the sum of its proper divisors (41192411).

123577221 is an equidigital number, since it uses as much as digits as its factorization.

123577221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41192410.

The product of its digits is 5880, while the sum is 30.

The square root of 123577221 is about 11116.5291795596. The cubic root of 123577221 is about 498.0957179605.

The spelling of 123577221 in words is "one hundred twenty-three million, five hundred seventy-seven thousand, two hundred twenty-one".