123158207 has 4 divisors (see below), whose sum is σ = 125177256. Its totient is φ = 121139160.

The previous prime is 123158197. The next prime is 123158213. The reversal of 123158207 is 702851321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 702851321 = 7523 ⋅93427.

It is a cyclic number.

It is not a de Polignac number, because 123158207 - 2⁶ = 123158143 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 123158207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123158267) 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, 1009433 + ... + 1009554.

It is an arithmetic number, because the mean of its divisors is an integer number (31294314).

Almost surely, 2^123158207 is an apocalyptic number.

123158207 is a deficient number, since it is larger than the sum of its proper divisors (2019049).

123158207 is an equidigital number, since it uses as much as digits as its factorization.

123158207 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2019048.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 123158207 is about 11097.6667367515. Note that the first 3 decimals coincide. The cubic root of 123158207 is about 497.5321151293.

The spelling of 123158207 in words is "one hundred twenty-three million, one hundred fifty-eight thousand, two hundred seven".