43750071397 has 2 divisors, whose sum is σ = 43750071398. Its totient is φ = 43750071396.

The previous prime is 43750071389. The next prime is 43750071439. The reversal of 43750071397 is 79317005734.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40632077476 + 3117993921 = 201574^2 + 55839^2 .

It is a cyclic number.

It is not a de Polignac number, because 43750071397 - 2³ = 43750071389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43750071367) 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, 21875035698 + 21875035699.

It is an arithmetic number, because the mean of its divisors is an integer number (21875035699).

Almost surely, 2^43750071397 is an apocalyptic number.

It is an amenable number.

43750071397 is a deficient number, since it is larger than the sum of its proper divisors (1).

43750071397 is an equidigital number, since it uses as much as digits as its factorization.

43750071397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 555660, while the sum is 46.

The spelling of 43750071397 in words is "forty-three billion, seven hundred fifty million, seventy-one thousand, three hundred ninety-seven".