43201997 has 2 divisors, whose sum is σ = 43201998. Its totient is φ = 43201996.

The previous prime is 43201927. The next prime is 43202021. The reversal of 43201997 is 79910234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42784681 + 417316 = 6541^2 + 646^2 .

It is a cyclic number.

It is not a de Polignac number, because 43201997 - 2¹⁰ = 43200973 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 (43201927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21600998 + 21600999.

It is an arithmetic number, because the mean of its divisors is an integer number (21600999).

Almost surely, 2^43201997 is an apocalyptic number.

It is an amenable number.

43201997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43201997 is an equidigital number, since it uses as much as digits as its factorization.

43201997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 43201997 is about 6572.8226052435. The cubic root of 43201997 is about 350.8875352276.

The spelling of 43201997 in words is "forty-three million, two hundred one thousand, nine hundred ninety-seven".