43397297887 has 2 divisors, whose sum is σ = 43397297888. Its totient is φ = 43397297886.

The previous prime is 43397297857. The next prime is 43397297899. The reversal of 43397297887 is 78879279334.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43397297887 - 2³⁵ = 9037559519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43397297807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21698648943 + 21698648944.

It is an arithmetic number, because the mean of its divisors is an integer number (21698648944).

Almost surely, 2^43397297887 is an apocalyptic number.

43397297887 is a deficient number, since it is larger than the sum of its proper divisors (1).

43397297887 is an equidigital number, since it uses as much as digits as its factorization.

43397297887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 128024064, while the sum is 67.

The spelling of 43397297887 in words is "forty-three billion, three hundred ninety-seven million, two hundred ninety-seven thousand, eight hundred eighty-seven".