123088591 has 4 divisors (see below), whose sum is σ = 123352632. Its totient is φ = 122824552.

The previous prime is 123088583. The next prime is 123088607. The reversal of 123088591 is 195880321.

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 123088591 - 2³ = 123088583 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 123088591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123088291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131320 + ... + 132253.

It is an arithmetic number, because the mean of its divisors is an integer number (30838158).

Almost surely, 2^123088591 is an apocalyptic number.

123088591 is a deficient number, since it is larger than the sum of its proper divisors (264041).

123088591 is an equidigital number, since it uses as much as digits as its factorization.

123088591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264040.

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 123088591 is about 11094.5297782285. The cubic root of 123088591 is about 497.4383530089.

The spelling of 123088591 in words is "one hundred twenty-three million, eighty-eight thousand, five hundred ninety-one".