923139739 has 2 divisors, whose sum is σ = 923139740. Its totient is φ = 923139738.

The previous prime is 923139691. The next prime is 923139769. The reversal of 923139739 is 937931329.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 923139739 - 2¹⁵ = 923106971 is a prime.

It is not a weakly prime, because it can be changed into another prime (923139769) 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 as a sum of consecutive naturals, namely, 461569869 + 461569870.

It is an arithmetic number, because the mean of its divisors is an integer number (461569870).

Almost surely, 2^923139739 is an apocalyptic number.

923139739 is a deficient number, since it is larger than the sum of its proper divisors (1).

923139739 is an equidigital number, since it uses as much as digits as its factorization.

923139739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 275562, while the sum is 46.

The square root of 923139739 is about 30383.2147574940. The cubic root of 923139739 is about 973.6939739798.

The spelling of 923139739 in words is "nine hundred twenty-three million, one hundred thirty-nine thousand, seven hundred thirty-nine".