43359389 has 2 divisors, whose sum is σ = 43359390. Its totient is φ = 43359388.

The previous prime is 43359383. The next prime is 43359391. The reversal of 43359389 is 98395334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42055225 + 1304164 = 6485^2 + 1142^2 .

It is a cyclic number.

It is not a de Polignac number, because 43359389 - 2⁴ = 43359373 is a prime.

It is a super-2 number, since 2×43359389² = 3760073228906642, which contains 22 as substring.

Together with 43359391, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43359383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21679694 + 21679695.

It is an arithmetic number, because the mean of its divisors is an integer number (21679695).

Almost surely, 2^43359389 is an apocalyptic number.

It is an amenable number.

43359389 is a deficient number, since it is larger than the sum of its proper divisors (1).

43359389 is an equidigital number, since it uses as much as digits as its factorization.

43359389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 349920, while the sum is 44.

The square root of 43359389 is about 6584.7846585898. The cubic root of 43359389 is about 351.3131325248.

The spelling of 43359389 in words is "forty-three million, three hundred fifty-nine thousand, three hundred eighty-nine".