43042397 has 2 divisors, whose sum is σ = 43042398. Its totient is φ = 43042396.

The previous prime is 43042387. The next prime is 43042411. The reversal of 43042397 is 79324034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40018276 + 3024121 = 6326^2 + 1739^2 .

It is a cyclic number.

It is not a de Polignac number, because 43042397 - 2⁴ = 43042381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43042327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21521198 + 21521199.

It is an arithmetic number, because the mean of its divisors is an integer number (21521199).

Almost surely, 2^43042397 is an apocalyptic number.

It is an amenable number.

43042397 is a deficient number, since it is larger than the sum of its proper divisors (1).

43042397 is an equidigital number, since it uses as much as digits as its factorization.

43042397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 43042397 is about 6560.6704687859. The cubic root of 43042397 is about 350.4549105173.

The spelling of 43042397 in words is "forty-three million, forty-two thousand, three hundred ninety-seven".