140239279 has 2 divisors, whose sum is σ = 140239280. Its totient is φ = 140239278.

The previous prime is 140239277. The next prime is 140239301. The reversal of 140239279 is 972932041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140239279 - 2¹ = 140239277 is a prime.

Together with 140239277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140239277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70119639 + 70119640.

It is an arithmetic number, because the mean of its divisors is an integer number (70119640).

Almost surely, 2^140239279 is an apocalyptic number.

140239279 is a deficient number, since it is larger than the sum of its proper divisors (1).

140239279 is an equidigital number, since it uses as much as digits as its factorization.

140239279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 140239279 is about 11842.2666327017. The cubic root of 140239279 is about 519.5450643818.

The spelling of 140239279 in words is "one hundred forty million, two hundred thirty-nine thousand, two hundred seventy-nine".