140067091 has 4 divisors (see below), whose sum is σ = 140401800. Its totient is φ = 139732384.

The previous prime is 140067077. The next prime is 140067101. The reversal of 140067091 is 190760041.

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 140067091 - 2⁹ = 140066579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140067001) 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, 166726 + ... + 167563.

It is an arithmetic number, because the mean of its divisors is an integer number (35100450).

Almost surely, 2^140067091 is an apocalyptic number.

140067091 is a deficient number, since it is larger than the sum of its proper divisors (334709).

140067091 is an equidigital number, since it uses as much as digits as its factorization.

140067091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334708.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 140067091 is about 11834.9943388242. The cubic root of 140067091 is about 519.3323420870.

The spelling of 140067091 in words is "one hundred forty million, sixty-seven thousand, ninety-one".