123935287 has 16 divisors (see below), whose sum is σ = 153169920. Its totient is φ = 97849728.

The previous prime is 123935267. The next prime is 123935291. The reversal of 123935287 is 782539321.

It is a cyclic number.

It is not a de Polignac number, because 123935287 - 2²³ = 115546679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123935267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5487 + ... + 16672.

It is an arithmetic number, because the mean of its divisors is an integer number (9573120).

Almost surely, 2^123935287 is an apocalyptic number.

123935287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

123935287 is a deficient number, since it is larger than the sum of its proper divisors (29234633).

123935287 is a wasteful number, since it uses less digits than its factorization.

123935287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22230.

The product of its digits is 90720, while the sum is 40.

The square root of 123935287 is about 11132.6226469777. The cubic root of 123935287 is about 498.5763328578.

The spelling of 123935287 in words is "one hundred twenty-three million, nine hundred thirty-five thousand, two hundred eighty-seven".