7938169 has 4 divisors (see below), whose sum is σ = 7945344. Its totient is φ = 7930996.

The previous prime is 7938163. The next prime is 7938173. The reversal of 7938169 is 9618397.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9618397 = 149 ⋅64553.

It is a cyclic number.

It is not a de Polignac number, because 7938169 - 2⁷ = 7938041 is a prime.

It is a super-2 number, since 2×7938169² = 126029054145122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7938163) 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, 1537 + ... + 4270.

It is an arithmetic number, because the mean of its divisors is an integer number (1986336).

Almost surely, 2^7938169 is an apocalyptic number.

It is an amenable number.

7938169 is a deficient number, since it is larger than the sum of its proper divisors (7175).

7938169 is a wasteful number, since it uses less digits than its factorization.

7938169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7174.

The product of its digits is 81648, while the sum is 43.

The square root of 7938169 is about 2817.4756431955. The cubic root of 7938169 is about 199.4834084815.

The spelling of 7938169 in words is "seven million, nine hundred thirty-eight thousand, one hundred sixty-nine".