123992539 has 4 divisors (see below), whose sum is σ = 135264600. Its totient is φ = 112720480.

The previous prime is 123992507. The next prime is 123992567. The reversal of 123992539 is 935299321.

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

It is a cyclic number.

It is not a de Polignac number, because 123992539 - 2⁵ = 123992507 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 123992495 and 123992504.

It is not an unprimeable number, because it can be changed into a prime (123992039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5636014 + ... + 5636035.

It is an arithmetic number, because the mean of its divisors is an integer number (33816150).

Almost surely, 2^123992539 is an apocalyptic number.

123992539 is a deficient number, since it is larger than the sum of its proper divisors (11272061).

123992539 is a wasteful number, since it uses less digits than its factorization.

123992539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11272060.

The product of its digits is 131220, while the sum is 43.

The square root of 123992539 is about 11135.1937118310. The cubic root of 123992539 is about 498.6530936110.

The spelling of 123992539 in words is "one hundred twenty-three million, nine hundred ninety-two thousand, five hundred thirty-nine".