140105479 has 4 divisors (see below), whose sum is σ = 141414984. Its totient is φ = 138795976.

The previous prime is 140105453. The next prime is 140105519. The reversal of 140105479 is 974501041.

140105479 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, and also an emirpimes, since its reverse is a distinct semiprime: 974501041 = 157 ⋅6207013.

It is a cyclic number.

It is not a de Polignac number, because 140105479 - 2¹⁹ = 139581191 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140105479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140105179) 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, 654592 + ... + 654805.

It is an arithmetic number, because the mean of its divisors is an integer number (35353746).

Almost surely, 2^140105479 is an apocalyptic number.

140105479 is a deficient number, since it is larger than the sum of its proper divisors (1309505).

140105479 is a wasteful number, since it uses less digits than its factorization.

140105479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309504.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 140105479 is about 11836.6160282405. The cubic root of 140105479 is about 519.3797819931.

The spelling of 140105479 in words is "one hundred forty million, one hundred five thousand, four hundred seventy-nine".