123136707 has 4 divisors (see below), whose sum is σ = 164182280. Its totient is φ = 82091136.

The previous prime is 123136693. The next prime is 123136753. The reversal of 123136707 is 707631321.

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

It is not a de Polignac number, because 123136707 - 2⁴ = 123136691 is a prime.

It is a super-2 number, since 2×123136707² = 30325297221607698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123136007) 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, 20522782 + ... + 20522787.

It is an arithmetic number, because the mean of its divisors is an integer number (41045570).

Almost surely, 2^123136707 is an apocalyptic number.

123136707 is a deficient number, since it is larger than the sum of its proper divisors (41045573).

123136707 is an equidigital number, since it uses as much as digits as its factorization.

123136707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41045572.

The product of its (nonzero) digits is 5292, while the sum is 30.

The square root of 123136707 is about 11096.6980223849. The cubic root of 123136707 is about 497.5031616846.

The spelling of 123136707 in words is "one hundred twenty-three million, one hundred thirty-six thousand, seven hundred seven".