40687834393 has 2 divisors, whose sum is σ = 40687834394. Its totient is φ = 40687834392.

The previous prime is 40687834379. The next prime is 40687834433. The reversal of 40687834393 is 39343878604.

40687834393 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39876894864 + 810939529 = 199692^2 + 28477^2 .

It is a cyclic number.

It is not a de Polignac number, because 40687834393 - 2²¹ = 40685737241 is a prime.

It is not a weakly prime, because it can be changed into another prime (40687834333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20343917196 + 20343917197.

It is an arithmetic number, because the mean of its divisors is an integer number (20343917197).

Almost surely, 2^40687834393 is an apocalyptic number.

It is an amenable number.

40687834393 is a deficient number, since it is larger than the sum of its proper divisors (1).

40687834393 is an equidigital number, since it uses as much as digits as its factorization.

40687834393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 55.

The spelling of 40687834393 in words is "forty billion, six hundred eighty-seven million, eight hundred thirty-four thousand, three hundred ninety-three".