939540247 has 4 divisors (see below), whose sum is σ = 939602376. Its totient is φ = 939478120.

The previous prime is 939540233. The next prime is 939540299. The reversal of 939540247 is 742045939.

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, and also an emirpimes, since its reverse is a distinct semiprime: 742045939 = 29 ⋅25587791.

It is a cyclic number.

It is not a de Polignac number, because 939540247 - 2¹¹ = 939538199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (939541247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7968 + ... + 44074.

It is an arithmetic number, because the mean of its divisors is an integer number (234900594).

Almost surely, 2^939540247 is an apocalyptic number.

939540247 is a deficient number, since it is larger than the sum of its proper divisors (62129).

939540247 is a wasteful number, since it uses less digits than its factorization.

939540247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62128.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 939540247 is about 30651.9207717885. The cubic root of 939540247 is about 979.4263778301.

The spelling of 939540247 in words is "nine hundred thirty-nine million, five hundred forty thousand, two hundred forty-seven".