923718139 has 4 divisors (see below), whose sum is σ = 923786424. Its totient is φ = 923649856.

The previous prime is 923718127. The next prime is 923718163. The reversal of 923718139 is 931817329.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 923718139 - 2¹⁹ = 923193851 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 923718095 and 923718104.

It is not an unprimeable number, because it can be changed into a prime (923718739) 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, 6262 + ... + 43435.

It is an arithmetic number, because the mean of its divisors is an integer number (230946606).

Almost surely, 2^923718139 is an apocalyptic number.

923718139 is a deficient number, since it is larger than the sum of its proper divisors (68285).

923718139 is a wasteful number, since it uses less digits than its factorization.

923718139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68284.

The product of its digits is 81648, while the sum is 43.

The square root of 923718139 is about 30392.7316804528. The cubic root of 923718139 is about 973.8972898987.

The spelling of 923718139 in words is "nine hundred twenty-three million, seven hundred eighteen thousand, one hundred thirty-nine".