140393894777 has 2 divisors, whose sum is σ = 140393894778. Its totient is φ = 140393894776.

The previous prime is 140393894759. The next prime is 140393894779. The reversal of 140393894777 is 777498393041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 107865608041 + 32528286736 = 328429^2 + 180356^2 .

It is a cyclic number.

It is not a de Polignac number, because 140393894777 - 2⁶ = 140393894713 is a prime.

Together with 140393894779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140393894779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70196947388 + 70196947389.

It is an arithmetic number, because the mean of its divisors is an integer number (70196947389).

Almost surely, 2^140393894777 is an apocalyptic number.

It is an amenable number.

140393894777 is a deficient number, since it is larger than the sum of its proper divisors (1).

140393894777 is an equidigital number, since it uses as much as digits as its factorization.

140393894777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32006016, while the sum is 62.

The spelling of 140393894777 in words is "one hundred forty billion, three hundred ninety-three million, eight hundred ninety-four thousand, seven hundred seventy-seven".