123140493 has 56 divisors (see below), whose sum is σ = 215102400. Its totient is φ = 69004224.

The previous prime is 123140491. The next prime is 123140497. The reversal of 123140493 is 394041321.

It is not a de Polignac number, because 123140493 - 2¹ = 123140491 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123140491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 300873 + ... + 301281.

Almost surely, 2^123140493 is an apocalyptic number.

It is an amenable number.

123140493 is a deficient number, since it is larger than the sum of its proper divisors (91961907).

123140493 is an frugal number, since it uses more digits than its factorization.

123140493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 123140493 is about 11096.8686123609. The cubic root of 123140493 is about 497.5082604287.

The spelling of 123140493 in words is "one hundred twenty-three million, one hundred forty thousand, four hundred ninety-three".