140608891 has 4 divisors (see below), whose sum is σ = 140633032. Its totient is φ = 140584752.

The previous prime is 140608879. The next prime is 140608927. The reversal of 140608891 is 198806041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140608891 - 2¹⁷ = 140477819 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140608891.

It is not an unprimeable number, because it can be changed into a prime (140608291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2656 + ... + 16978.

It is an arithmetic number, because the mean of its divisors is an integer number (35158258).

Almost surely, 2^140608891 is an apocalyptic number.

140608891 is a deficient number, since it is larger than the sum of its proper divisors (24141).

140608891 is an equidigital number, since it uses as much as digits as its factorization.

140608891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24140.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 140608891 is about 11857.8619911011. The cubic root of 140608891 is about 520.0010983705.

The spelling of 140608891 in words is "one hundred forty million, six hundred eight thousand, eight hundred ninety-one".