123752991 has 8 divisors (see below), whose sum is σ = 166303744. Its totient is φ = 81852120.

The previous prime is 123752989. The next prime is 123752999. The reversal of 123752991 is 199257321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 123752991 - 2¹ = 123752989 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 (123752999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162025 + ... + 162786.

It is an arithmetic number, because the mean of its divisors is an integer number (20787968).

Almost surely, 2^123752991 is an apocalyptic number.

123752991 is a deficient number, since it is larger than the sum of its proper divisors (42550753).

123752991 is a wasteful number, since it uses less digits than its factorization.

123752991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324941.

The product of its digits is 34020, while the sum is 39.

The square root of 123752991 is about 11124.4321652838. The cubic root of 123752991 is about 498.3317614842.

The spelling of 123752991 in words is "one hundred twenty-three million, seven hundred fifty-two thousand, nine hundred ninety-one".