140806979 has 2 divisors, whose sum is σ = 140806980. Its totient is φ = 140806978.

The previous prime is 140806969. The next prime is 140807021. The reversal of 140806979 is 979608041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140806979 - 2⁸ = 140806723 is a prime.

It is not a weakly prime, because it can be changed into another prime (140806969) 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, 70403489 + 70403490.

It is an arithmetic number, because the mean of its divisors is an integer number (70403490).

Almost surely, 2^140806979 is an apocalyptic number.

140806979 is a deficient number, since it is larger than the sum of its proper divisors (1).

140806979 is an equidigital number, since it uses as much as digits as its factorization.

140806979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 140806979 is about 11866.2116532615. The cubic root of 140806979 is about 520.2451740793.

The spelling of 140806979 in words is "one hundred forty million, eight hundred six thousand, nine hundred seventy-nine".