140260639 has 2 divisors, whose sum is σ = 140260640. Its totient is φ = 140260638.

The previous prime is 140260613. The next prime is 140260661. The reversal of 140260639 is 936062041.

140260639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140260639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140260639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140260609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70130319 + 70130320.

It is an arithmetic number, because the mean of its divisors is an integer number (70130320).

Almost surely, 2^140260639 is an apocalyptic number.

140260639 is a deficient number, since it is larger than the sum of its proper divisors (1).

140260639 is an equidigital number, since it uses as much as digits as its factorization.

140260639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 140260639 is about 11843.1684527410. The cubic root of 140260639 is about 519.5714405376.

The spelling of 140260639 in words is "one hundred forty million, two hundred sixty thousand, six hundred thirty-nine".