140240479 has 2 divisors, whose sum is σ = 140240480. Its totient is φ = 140240478.

The previous prime is 140240449. The next prime is 140240533. The reversal of 140240479 is 974042041.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140240479 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140240479.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140240449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70120239 + 70120240.

It is an arithmetic number, because the mean of its divisors is an integer number (70120240).

Almost surely, 2^140240479 is an apocalyptic number.

140240479 is a deficient number, since it is larger than the sum of its proper divisors (1).

140240479 is an equidigital number, since it uses as much as digits as its factorization.

140240479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 140240479 is about 11842.3172985696. The cubic root of 140240479 is about 519.5465462593.

The spelling of 140240479 in words is "one hundred forty million, two hundred forty thousand, four hundred seventy-nine".