12169639 has 4 divisors (see below), whose sum is σ = 12562240. Its totient is φ = 11777040.

The previous prime is 12169631. The next prime is 12169669. The reversal of 12169639 is 93696121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93696121 = 1289 ⋅72689.

It is a cyclic number.

It is not a de Polignac number, because 12169639 - 2³ = 12169631 is a prime.

It is a super-2 number, since 2×12169639² = 296200226780642, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 12169598 and 12169607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12169631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196254 + ... + 196315.

It is an arithmetic number, because the mean of its divisors is an integer number (3140560).

Almost surely, 2^12169639 is an apocalyptic number.

12169639 is a deficient number, since it is larger than the sum of its proper divisors (392601).

12169639 is an equidigital number, since it uses as much as digits as its factorization.

12169639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392600.

The product of its digits is 17496, while the sum is 37.

The square root of 12169639 is about 3488.5009674644. The cubic root of 12169639 is about 230.0166276574.

The spelling of 12169639 in words is "twelve million, one hundred sixty-nine thousand, six hundred thirty-nine".