140104643 has 4 divisors (see below), whose sum is σ = 160119600. Its totient is φ = 120089688.

The previous prime is 140104639. The next prime is 140104673. The reversal of 140104643 is 346401041.

140104643 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.

It is a cyclic number.

It is not a de Polignac number, because 140104643 - 2² = 140104639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140104673) 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, 10007468 + ... + 10007481.

It is an arithmetic number, because the mean of its divisors is an integer number (40029900).

Almost surely, 2^140104643 is an apocalyptic number.

140104643 is a deficient number, since it is larger than the sum of its proper divisors (20014957).

140104643 is an equidigital number, since it uses as much as digits as its factorization.

140104643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20014956.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 140104643 is about 11836.5807140407. The cubic root of 140104643 is about 519.3787489563.

Adding to 140104643 its reverse (346401041), we get a palindrome (486505684).

The spelling of 140104643 in words is "one hundred forty million, one hundred four thousand, six hundred forty-three".