43089797 has 2 divisors, whose sum is σ = 43089798. Its totient is φ = 43089796.

The previous prime is 43089779. The next prime is 43089799. The reversal of 43089797 is 79798034.

Together with previous prime (43089779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35058241 + 8031556 = 5921^2 + 2834^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43089797 is a prime.

Together with 43089799, 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 (43089799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21544898 + 21544899.

It is an arithmetic number, because the mean of its divisors is an integer number (21544899).

Almost surely, 2^43089797 is an apocalyptic number.

It is an amenable number.

43089797 is a deficient number, since it is larger than the sum of its proper divisors (1).

43089797 is an equidigital number, since it uses as much as digits as its factorization.

43089797 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 43089797 is about 6564.2819104606. The cubic root of 43089797 is about 350.5835082866.

The spelling of 43089797 in words is "forty-three million, eighty-nine thousand, seven hundred ninety-seven".