140087091 has 4 divisors (see below), whose sum is σ = 186782792. Its totient is φ = 93391392.

The previous prime is 140087083. The next prime is 140087093. The reversal of 140087091 is 190780041.

140087091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190780041 = 3 ⋅63593347.

It is not a de Polignac number, because 140087091 - 2³ = 140087083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140087093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23347846 + ... + 23347851.

It is an arithmetic number, because the mean of its divisors is an integer number (46695698).

Almost surely, 2^140087091 is an apocalyptic number.

140087091 is a deficient number, since it is larger than the sum of its proper divisors (46695701).

140087091 is an equidigital number, since it uses as much as digits as its factorization.

140087091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46695700.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 140087091 is about 11835.8392604834. The cubic root of 140087091 is about 519.3570591766.

The spelling of 140087091 in words is "one hundred forty million, eighty-seven thousand, ninety-one".