123891315 has 8 divisors (see below), whose sum is σ = 198226128. Its totient is φ = 66075360.

The previous prime is 123891307. The next prime is 123891319. The reversal of 123891315 is 513198321.

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

It is not a de Polignac number, because 123891315 - 2³ = 123891307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123891319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4129696 + ... + 4129725.

It is an arithmetic number, because the mean of its divisors is an integer number (24778266).

Almost surely, 2^123891315 is an apocalyptic number.

123891315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123891315 is a deficient number, since it is larger than the sum of its proper divisors (74334813).

123891315 is an equidigital number, since it uses as much as digits as its factorization.

123891315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8259429.

The product of its digits is 6480, while the sum is 33.

The square root of 123891315 is about 11130.6475552863. The cubic root of 123891315 is about 498.5173612435.

The spelling of 123891315 in words is "one hundred twenty-three million, eight hundred ninety-one thousand, three hundred fifteen".