140349779 has 2 divisors, whose sum is σ = 140349780. Its totient is φ = 140349778.

The previous prime is 140349761. The next prime is 140349851. The reversal of 140349779 is 977943041.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140349779 - 2²⁰ = 139301203 is a prime.

It is not a weakly prime, because it can be changed into another prime (140349719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70174889 + 70174890.

It is an arithmetic number, because the mean of its divisors is an integer number (70174890).

Almost surely, 2^140349779 is an apocalyptic number.

140349779 is a deficient number, since it is larger than the sum of its proper divisors (1).

140349779 is an equidigital number, since it uses as much as digits as its factorization.

140349779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 140349779 is about 11846.9312060128. The cubic root of 140349779 is about 519.6814851672.

The spelling of 140349779 in words is "one hundred forty million, three hundred forty-nine thousand, seven hundred seventy-nine".