123326981 has 4 divisors (see below), whose sum is σ = 123972864. Its totient is φ = 122681100.

The previous prime is 123326969. The next prime is 123327007. The reversal of 123326981 is 189623321.

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 123326981 - 2²² = 119132677 is a prime.

It is a super-2 number, since 2×123326981² = 30419088485148722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123326921) 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 3 ways as a sum of consecutive naturals, for example, 322655 + ... + 323036.

It is an arithmetic number, because the mean of its divisors is an integer number (30993216).

Almost surely, 2^123326981 is an apocalyptic number.

It is an amenable number.

123326981 is a deficient number, since it is larger than the sum of its proper divisors (645883).

123326981 is an equidigital number, since it uses as much as digits as its factorization.

123326981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645882.

The product of its digits is 15552, while the sum is 35.

The square root of 123326981 is about 11105.2681642543. The cubic root of 123326981 is about 497.7592813603.

The spelling of 123326981 in words is "one hundred twenty-three million, three hundred twenty-six thousand, nine hundred eighty-one".