140785091 has 4 divisors (see below), whose sum is σ = 140950992. Its totient is φ = 140619192.

The previous prime is 140785067. The next prime is 140785097. The reversal of 140785091 is 190587041.

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 140785091 - 2²² = 136590787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140785097) 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, 81671 + ... + 83376.

It is an arithmetic number, because the mean of its divisors is an integer number (35237748).

Almost surely, 2^140785091 is an apocalyptic number.

140785091 is a deficient number, since it is larger than the sum of its proper divisors (165901).

140785091 is an equidigital number, since it uses as much as digits as its factorization.

140785091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165900.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 140785091 is about 11865.2893348624. The cubic root of 140785091 is about 520.2182158596.

The spelling of 140785091 in words is "one hundred forty million, seven hundred eighty-five thousand, ninety-one".