123149379 has 4 divisors (see below), whose sum is σ = 164199176. Its totient is φ = 82099584.

The previous prime is 123149371. The next prime is 123149381. The reversal of 123149379 is 973941321.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 123149379 - 2³ = 123149371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123149371) 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, 20524894 + ... + 20524899.

It is an arithmetic number, because the mean of its divisors is an integer number (41049794).

Almost surely, 2^123149379 is an apocalyptic number.

123149379 is a deficient number, since it is larger than the sum of its proper divisors (41049797).

123149379 is an equidigital number, since it uses as much as digits as its factorization.

123149379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41049796.

The product of its digits is 40824, while the sum is 39.

The square root of 123149379 is about 11097.2689883593. The cubic root of 123149379 is about 497.5202271180.

The spelling of 123149379 in words is "one hundred twenty-three million, one hundred forty-nine thousand, three hundred seventy-nine".