140679281 has 2 divisors, whose sum is σ = 140679282. Its totient is φ = 140679280.

The previous prime is 140679277. The next prime is 140679299. The reversal of 140679281 is 182976041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73685056 + 66994225 = 8584^2 + 8185^2 .

It is a cyclic number.

It is not a de Polignac number, because 140679281 - 2² = 140679277 is a prime.

It is a super-2 number, since 2×140679281² = 39581320205353922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (140679181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70339640 + 70339641.

It is an arithmetic number, because the mean of its divisors is an integer number (70339641).

Almost surely, 2^140679281 is an apocalyptic number.

It is an amenable number.

140679281 is a deficient number, since it is larger than the sum of its proper divisors (1).

140679281 is an equidigital number, since it uses as much as digits as its factorization.

140679281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 140679281 is about 11860.8296927323. The cubic root of 140679281 is about 520.0878562107.

The spelling of 140679281 in words is "one hundred forty million, six hundred seventy-nine thousand, two hundred eighty-one".