7975939 has 4 divisors (see below), whose sum is σ = 8016624. Its totient is φ = 7935256.

The previous prime is 7975937. The next prime is 7975943. The reversal of 7975939 is 9395797.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7975939 - 2¹ = 7975937 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7975892 and 7975901.

It is not an unprimeable number, because it can be changed into a prime (7975937) 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, 20047 + ... + 20440.

It is an arithmetic number, because the mean of its divisors is an integer number (2004156).

Almost surely, 2^7975939 is an apocalyptic number.

7975939 is a deficient number, since it is larger than the sum of its proper divisors (40685).

7975939 is a wasteful number, since it uses less digits than its factorization.

7975939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40684.

The product of its digits is 535815, while the sum is 49.

The square root of 7975939 is about 2824.1704976860. The cubic root of 7975939 is about 199.7992903122.

The spelling of 7975939 in words is "seven million, nine hundred seventy-five thousand, nine hundred thirty-nine".