140469391 has 2 divisors, whose sum is σ = 140469392. Its totient is φ = 140469390.

The previous prime is 140469377. The next prime is 140469421. The reversal of 140469391 is 193964041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140469391 - 2⁹ = 140468879 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140469391.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140469361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70234695 + 70234696.

It is an arithmetic number, because the mean of its divisors is an integer number (70234696).

Almost surely, 2^140469391 is an apocalyptic number.

140469391 is a deficient number, since it is larger than the sum of its proper divisors (1).

140469391 is an equidigital number, since it uses as much as digits as its factorization.

140469391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 140469391 is about 11851.9783580633. The cubic root of 140469391 is about 519.8290747398.

The spelling of 140469391 in words is "one hundred forty million, four hundred sixty-nine thousand, three hundred ninety-one".