40287170393 has 2 divisors, whose sum is σ = 40287170394. Its totient is φ = 40287170392.

The previous prime is 40287170387. The next prime is 40287170459. The reversal of 40287170393 is 39307178204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22648143049 + 17639027344 = 150493^2 + 132812^2 .

It is a cyclic number.

It is not a de Polignac number, because 40287170393 - 2¹⁴ = 40287154009 is a prime.

It is not a weakly prime, because it can be changed into another prime (40287176393) 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, 20143585196 + 20143585197.

It is an arithmetic number, because the mean of its divisors is an integer number (20143585197).

Almost surely, 2^40287170393 is an apocalyptic number.

It is an amenable number.

40287170393 is a deficient number, since it is larger than the sum of its proper divisors (1).

40287170393 is an equidigital number, since it uses as much as digits as its factorization.

40287170393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 44.

The spelling of 40287170393 in words is "forty billion, two hundred eighty-seven million, one hundred seventy thousand, three hundred ninety-three".