43642469 has 4 divisors (see below), whose sum is σ = 46999596. Its totient is φ = 40285344.

The previous prime is 43642457. The next prime is 43642481. The reversal of 43642469 is 96424634.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96424634 = 2 ⋅48212317.

It is an interprime number because it is at equal distance from previous prime (43642457) and next prime (43642481).

It can be written as a sum of positive squares in 2 ways, for example, as 8773444 + 34869025 = 2962^2 + 5905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43642469 is a prime.

It is a super-2 number, since 2×43642469² = 3809330200831922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43642369) 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, 1678544 + ... + 1678569.

It is an arithmetic number, because the mean of its divisors is an integer number (11749899).

Almost surely, 2^43642469 is an apocalyptic number.

It is an amenable number.

43642469 is a deficient number, since it is larger than the sum of its proper divisors (3357127).

43642469 is a wasteful number, since it uses less digits than its factorization.

43642469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3357126.

The product of its digits is 124416, while the sum is 38.

The square root of 43642469 is about 6606.2446972543. The cubic root of 43642469 is about 352.0760128757.

The spelling of 43642469 in words is "forty-three million, six hundred forty-two thousand, four hundred sixty-nine".