140394671 has 4 divisors (see below), whose sum is σ = 141256152. Its totient is φ = 139533192.

The previous prime is 140394649. The next prime is 140394679. The reversal of 140394671 is 176493041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176493041 = 12577 ⋅14033.

It is a cyclic number.

It is not a de Polignac number, because 140394671 - 2¹⁰ = 140393647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140394679) 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, 430496 + ... + 430821.

It is an arithmetic number, because the mean of its divisors is an integer number (35314038).

Almost surely, 2^140394671 is an apocalyptic number.

140394671 is a deficient number, since it is larger than the sum of its proper divisors (861481).

140394671 is an equidigital number, since it uses as much as digits as its factorization.

140394671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861480.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 140394671 is about 11848.8257224081. The cubic root of 140394671 is about 519.7368873547.

The spelling of 140394671 in words is "one hundred forty million, three hundred ninety-four thousand, six hundred seventy-one".