43097881 has 2 divisors, whose sum is σ = 43097882. Its totient is φ = 43097880.

The previous prime is 43097869. The next prime is 43097891. The reversal of 43097881 is 18879034.

43097881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33825856 + 9272025 = 5816^2 + 3045^2 .

It is a cyclic number.

It is not a de Polignac number, because 43097881 - 2⁵ = 43097849 is a prime.

It is a super-2 number, since 2×43097881² = 3714854693380322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43097891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21548940 + 21548941.

It is an arithmetic number, because the mean of its divisors is an integer number (21548941).

Almost surely, 2^43097881 is an apocalyptic number.

It is an amenable number.

43097881 is a deficient number, since it is larger than the sum of its proper divisors (1).

43097881 is an equidigital number, since it uses as much as digits as its factorization.

43097881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 43097881 is about 6564.8976381967. The cubic root of 43097881 is about 350.6054310313.

The spelling of 43097881 in words is "forty-three million, ninety-seven thousand, eight hundred eighty-one".