43920869 has 4 divisors (see below), whose sum is σ = 45830496. Its totient is φ = 42011244.

The previous prime is 43920857. The next prime is 43920871. The reversal of 43920869 is 96802934.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 43920869 - 2¹² = 43916773 is a prime.

It is a super-2 number, since 2×43920869² = 3858085467430322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43920829) 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, 954779 + ... + 954824.

It is an arithmetic number, because the mean of its divisors is an integer number (11457624).

Almost surely, 2^43920869 is an apocalyptic number.

It is an amenable number.

43920869 is a deficient number, since it is larger than the sum of its proper divisors (1909627).

43920869 is a wasteful number, since it uses less digits than its factorization.

43920869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909626.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 43920869 is about 6627.2821729575. The cubic root of 43920869 is about 352.8230701753.

The spelling of 43920869 in words is "forty-three million, nine hundred twenty thousand, eight hundred sixty-nine".