43125677897 has 2 divisors, whose sum is σ = 43125677898. Its totient is φ = 43125677896.

The previous prime is 43125677891. The next prime is 43125677921. The reversal of 43125677897 is 79877652134.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30360971536 + 12764706361 = 174244^2 + 112981^2 .

It is a cyclic number.

It is not a de Polignac number, because 43125677897 - 2⁸ = 43125677641 is a prime.

It is not a weakly prime, because it can be changed into another prime (43125677891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21562838948 + 21562838949.

It is an arithmetic number, because the mean of its divisors is an integer number (21562838949).

Almost surely, 2^43125677897 is an apocalyptic number.

It is an amenable number.

43125677897 is a deficient number, since it is larger than the sum of its proper divisors (1).

43125677897 is an equidigital number, since it uses as much as digits as its factorization.

43125677897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17781120, while the sum is 59.

The spelling of 43125677897 in words is "forty-three billion, one hundred twenty-five million, six hundred seventy-seven thousand, eight hundred ninety-seven".