939949939 has 4 divisors (see below), whose sum is σ = 940014256. Its totient is φ = 939885624.

The previous prime is 939949921. The next prime is 939949949.

939949939 is nontrivially palindromic in base 10.

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 939949939 - 2¹⁹ = 939425651 is a prime.

It is a super-2 number, since 2×939949939² = 1767011775652207442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (939949909) 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, 1522 + ... + 43384.

It is an arithmetic number, because the mean of its divisors is an integer number (235003564).

Almost surely, 2^939949939 is an apocalyptic number.

939949939 is a deficient number, since it is larger than the sum of its proper divisors (64317).

939949939 is a wasteful number, since it uses less digits than its factorization.

939949939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64316.

The product of its digits is 19131876, while the sum is 64.

The square root of 939949939 is about 30658.6030177502. The cubic root of 939949939 is about 979.5687186692.

The spelling of 939949939 in words is "nine hundred thirty-nine million, nine hundred forty-nine thousand, nine hundred thirty-nine".