43390097 has 2 divisors, whose sum is σ = 43390098. Its totient is φ = 43390096.

The previous prime is 43390073. The next prime is 43390099. The reversal of 43390097 is 79009334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32307856 + 11082241 = 5684^2 + 3329^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43390097 is a prime.

Together with 43390099, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43390099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21695048 + 21695049.

It is an arithmetic number, because the mean of its divisors is an integer number (21695049).

Almost surely, 2^43390097 is an apocalyptic number.

It is an amenable number.

43390097 is a deficient number, since it is larger than the sum of its proper divisors (1).

43390097 is an equidigital number, since it uses as much as digits as its factorization.

43390097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 35.

The square root of 43390097 is about 6587.1159850120. The cubic root of 43390097 is about 351.3960486523.

The spelling of 43390097 in words is "forty-three million, three hundred ninety thousand, ninety-seven".