123113905 has 8 divisors (see below), whose sum is σ = 148678632. Its totient is φ = 97863168.

The previous prime is 123113897. The next prime is 123113933. The reversal of 123113905 is 509311321.

It can be written as a sum of positive squares in 4 ways, for example, as 369664 + 122744241 = 608^2 + 11079^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 123113905 - 2³ = 123113897 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 123113905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77632 + ... + 79201.

It is an arithmetic number, because the mean of its divisors is an integer number (18584829).

Almost surely, 2^123113905 is an apocalyptic number.

It is an amenable number.

123113905 is a deficient number, since it is larger than the sum of its proper divisors (25564727).

123113905 is a wasteful number, since it uses less digits than its factorization.

123113905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156995.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 123113905 is about 11095.6705520667. The cubic root of 123113905 is about 497.4724511904.

The spelling of 123113905 in words is "one hundred twenty-three million, one hundred thirteen thousand, nine hundred five".