43859969 has 2 divisors, whose sum is σ = 43859970. Its totient is φ = 43859968.

The previous prime is 43859953. The next prime is 43859971. The reversal of 43859969 is 96995834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33779344 + 10080625 = 5812^2 + 3175^2 .

It is a cyclic number.

It is not a de Polignac number, because 43859969 - 2⁴ = 43859953 is a prime.

It is a super-2 number, since 2×43859969² = 3847393761361922, which contains 22 as substring.

Together with 43859971, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43859969.

It is not a weakly prime, because it can be changed into another prime (43859909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21929984 + 21929985.

It is an arithmetic number, because the mean of its divisors is an integer number (21929985).

It is a Proth number, since it is equal to 2677 ⋅ 2¹⁴ + 1 and 2677 < 2¹⁴.

Almost surely, 2^43859969 is an apocalyptic number.

It is an amenable number.

43859969 is a deficient number, since it is larger than the sum of its proper divisors (1).

43859969 is an equidigital number, since it uses as much as digits as its factorization.

43859969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2099520, while the sum is 53.

The square root of 43859969 is about 6622.6859354797. The cubic root of 43859969 is about 352.6599217354.

The spelling of 43859969 in words is "forty-three million, eight hundred fifty-nine thousand, nine hundred sixty-nine".