140263639 has 2 divisors, whose sum is σ = 140263640. Its totient is φ = 140263638.

The previous prime is 140263601. The next prime is 140263657. The reversal of 140263639 is 936362041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140263639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140263699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70131819 + 70131820.

It is an arithmetic number, because the mean of its divisors is an integer number (70131820).

Almost surely, 2^140263639 is an apocalyptic number.

140263639 is a deficient number, since it is larger than the sum of its proper divisors (1).

140263639 is an equidigital number, since it uses as much as digits as its factorization.

140263639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 140263639 is about 11843.2951073593. The cubic root of 140263639 is about 519.5751448394.

The spelling of 140263639 in words is "one hundred forty million, two hundred sixty-three thousand, six hundred thirty-nine".