140266391 has 2 divisors, whose sum is σ = 140266392. Its totient is φ = 140266390.

The previous prime is 140266367. The next prime is 140266457. The reversal of 140266391 is 193662041.

140266391 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 140266391 - 2¹⁴ = 140250007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140266691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70133195 + 70133196.

It is an arithmetic number, because the mean of its divisors is an integer number (70133196).

Almost surely, 2^140266391 is an apocalyptic number.

140266391 is a deficient number, since it is larger than the sum of its proper divisors (1).

140266391 is an equidigital number, since it uses as much as digits as its factorization.

140266391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 140266391 is about 11843.4112906713. The cubic root of 140266391 is about 519.5785428724.

The spelling of 140266391 in words is "one hundred forty million, two hundred sixty-six thousand, three hundred ninety-one".