140388667 has 2 divisors, whose sum is σ = 140388668. Its totient is φ = 140388666.

The previous prime is 140388653. The next prime is 140388683. The reversal of 140388667 is 766883041.

140388667 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 a de Polignac number, because none of the positive numbers 2^k-140388667 is a prime.

It is not a weakly prime, because it can be changed into another prime (140388637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70194333 + 70194334.

It is an arithmetic number, because the mean of its divisors is an integer number (70194334).

Almost surely, 2^140388667 is an apocalyptic number.

140388667 is a deficient number, since it is larger than the sum of its proper divisors (1).

140388667 is an equidigital number, since it uses as much as digits as its factorization.

140388667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The square root of 140388667 is about 11848.5723612594. The cubic root of 140388667 is about 519.7294783727.

The spelling of 140388667 in words is "one hundred forty million, three hundred eighty-eight thousand, six hundred sixty-seven".