140778863 has 2 divisors, whose sum is σ = 140778864. Its totient is φ = 140778862.

The previous prime is 140778857. The next prime is 140778877. The reversal of 140778863 is 368877041.

140778863 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 is a cyclic number.

It is not a de Polignac number, because 140778863 - 2¹⁰ = 140777839 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140778893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70389431 + 70389432.

It is an arithmetic number, because the mean of its divisors is an integer number (70389432).

Almost surely, 2^140778863 is an apocalyptic number.

140778863 is a deficient number, since it is larger than the sum of its proper divisors (1).

140778863 is an equidigital number, since it uses as much as digits as its factorization.

140778863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 140778863 is about 11865.0268857681. The cubic root of 140778863 is about 520.2105446713.

The spelling of 140778863 in words is "one hundred forty million, seven hundred seventy-eight thousand, eight hundred sixty-three".