938661923 has 4 divisors (see below), whose sum is σ = 940698528. Its totient is φ = 936625320.

The previous prime is 938661877. The next prime is 938661929. The reversal of 938661923 is 329166839.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 329166839 = 449 ⋅733111.

It is a cyclic number.

It is not a de Polignac number, because 938661923 - 2¹⁶ = 938596387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (938661929) 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 3 ways as a sum of consecutive naturals, for example, 1017611 + ... + 1018532.

It is an arithmetic number, because the mean of its divisors is an integer number (235174632).

Almost surely, 2^938661923 is an apocalyptic number.

938661923 is a deficient number, since it is larger than the sum of its proper divisors (2036605).

938661923 is a wasteful number, since it uses less digits than its factorization.

938661923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036604.

The product of its digits is 419904, while the sum is 47.

The square root of 938661923 is about 30637.5900325075. The cubic root of 938661923 is about 979.1210788984.

The spelling of 938661923 in words is "nine hundred thirty-eight million, six hundred sixty-one thousand, nine hundred twenty-three".