919538939 has 18 divisors (see below), whose sum is σ = 1032828228. Its totient is φ = 811898400.

The previous prime is 919538899. The next prime is 919538941. The reversal of 919538939 is 939835919.

It is not a de Polignac number, because 919538939 - 2²⁸ = 651103483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919538999) 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 17 ways as a sum of consecutive naturals, for example, 4123382 + ... + 4123604.

It is an arithmetic number, because the mean of its divisors is an integer number (57379346).

Almost surely, 2^919538939 is an apocalyptic number.

919538939 is a deficient number, since it is larger than the sum of its proper divisors (113289289).

919538939 is an equidigital number, since it uses as much as digits as its factorization.

919538939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 275 counting only the distinct ones).

The product of its digits is 2361960, while the sum is 56.

The square root of 919538939 is about 30323.9004582194. The cubic root of 919538939 is about 972.4263270496.

The spelling of 919538939 in words is "nine hundred nineteen million, five hundred thirty-eight thousand, nine hundred thirty-nine".