43469681 has 4 divisors (see below), whose sum is σ = 43564032. Its totient is φ = 43375332.

The previous prime is 43469653. The next prime is 43469779. The reversal of 43469681 is 18696434.

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 an emirpimes, since its reverse is a distinct semiprime: 18696434 = 2 ⋅9348217.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43469681 is a prime.

It is a super-2 number, since 2×43469681² = 3779226332483522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43469641) 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, 46481 + ... + 47406.

It is an arithmetic number, because the mean of its divisors is an integer number (10891008).

Almost surely, 2^43469681 is an apocalyptic number.

It is an amenable number.

43469681 is a deficient number, since it is larger than the sum of its proper divisors (94351).

43469681 is an equidigital number, since it uses as much as digits as its factorization.

43469681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94350.

The product of its digits is 124416, while the sum is 41.

The square root of 43469681 is about 6593.1541010354. The cubic root of 43469681 is about 351.6107552699.

The spelling of 43469681 in words is "forty-three million, four hundred sixty-nine thousand, six hundred eighty-one".