43740997 has 2 divisors, whose sum is σ = 43740998. Its totient is φ = 43740996.

The previous prime is 43740989. The next prime is 43741001. The reversal of 43740997 is 79904734.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43639236 + 101761 = 6606^2 + 319^2 .

It is a cyclic number.

It is not a de Polignac number, because 43740997 - 2³ = 43740989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43740947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21870498 + 21870499.

It is an arithmetic number, because the mean of its divisors is an integer number (21870499).

Almost surely, 2^43740997 is an apocalyptic number.

It is an amenable number.

43740997 is a deficient number, since it is larger than the sum of its proper divisors (1).

43740997 is an equidigital number, since it uses as much as digits as its factorization.

43740997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 43740997 is about 6613.6976798157. The cubic root of 43740997 is about 352.3407647240.

The spelling of 43740997 in words is "forty-three million, seven hundred forty thousand, nine hundred ninety-seven".