43947687493 has 2 divisors, whose sum is σ = 43947687494. Its totient is φ = 43947687492.

The previous prime is 43947687419. The next prime is 43947687521. The reversal of 43947687493 is 39478674934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22904703649 + 21042983844 = 151343^2 + 145062^2 .

It is a cyclic number.

It is not a de Polignac number, because 43947687493 - 2³³ = 35357752901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43947687193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21973843746 + 21973843747.

It is an arithmetic number, because the mean of its divisors is an integer number (21973843747).

Almost surely, 2^43947687493 is an apocalyptic number.

It is an amenable number.

43947687493 is a deficient number, since it is larger than the sum of its proper divisors (1).

43947687493 is an equidigital number, since it uses as much as digits as its factorization.

43947687493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109734912, while the sum is 64.

The spelling of 43947687493 in words is "forty-three billion, nine hundred forty-seven million, six hundred eighty-seven thousand, four hundred ninety-three".