140667091 has 4 divisors (see below), whose sum is σ = 141034752. Its totient is φ = 140299432.

The previous prime is 140667083. The next prime is 140667097. The reversal of 140667091 is 190766041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 190766041 = 149 ⋅1280309.

It is a cyclic number.

It is not a de Polignac number, because 140667091 - 2³ = 140667083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140667097) 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, 183256 + ... + 184021.

It is an arithmetic number, because the mean of its divisors is an integer number (35258688).

Almost surely, 2^140667091 is an apocalyptic number.

140667091 is a deficient number, since it is larger than the sum of its proper divisors (367661).

140667091 is an equidigital number, since it uses as much as digits as its factorization.

140667091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367660.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 140667091 is about 11860.3158052389. The cubic root of 140667091 is about 520.0728337330.

The spelling of 140667091 in words is "one hundred forty million, six hundred sixty-seven thousand, ninety-one".