39503939 has 4 divisors (see below), whose sum is σ = 39788280. Its totient is φ = 39219600.

The previous prime is 39503927. The next prime is 39503953. The reversal of 39503939 is 93930593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93930593 = 17 ⋅5525329.

It is a cyclic number.

It is not a de Polignac number, because 39503939 - 2¹⁶ = 39438403 is a prime.

It is a super-2 number, since 2×39503939² = 3121122393031442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 39503896 and 39503905.

It is not an unprimeable number, because it can be changed into a prime (39503909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 141962 + ... + 142239.

It is an arithmetic number, because the mean of its divisors is an integer number (9947070).

Almost surely, 2^39503939 is an apocalyptic number.

39503939 is a deficient number, since it is larger than the sum of its proper divisors (284341).

39503939 is a wasteful number, since it uses less digits than its factorization.

39503939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284340.

The product of its (nonzero) digits is 98415, while the sum is 41.

The square root of 39503939 is about 6285.2159071905. The cubic root of 39503939 is about 340.5755505356.

The spelling of 39503939 in words is "thirty-nine million, five hundred three thousand, nine hundred thirty-nine".