140838655 has 4 divisors (see below), whose sum is σ = 169006392. Its totient is φ = 112670920.

The previous prime is 140838571. The next prime is 140838661. The reversal of 140838655 is 556838041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556838041 = 173 ⋅3218717.

It is not a de Polignac number, because 140838655 - 2²¹ = 138741503 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14083861 + ... + 14083870.

It is an arithmetic number, because the mean of its divisors is an integer number (42251598).

Almost surely, 2^140838655 is an apocalyptic number.

140838655 is a deficient number, since it is larger than the sum of its proper divisors (28167737).

140838655 is an equidigital number, since it uses as much as digits as its factorization.

140838655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28167736.

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 140838655 is about 11867.5462923049. The cubic root of 140838655 is about 520.2841826822.

The spelling of 140838655 in words is "one hundred forty million, eight hundred thirty-eight thousand, six hundred fifty-five".