140949979 has 2 divisors, whose sum is σ = 140949980. Its totient is φ = 140949978.

The previous prime is 140949973. The next prime is 140950013. The reversal of 140949979 is 979949041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140949979 - 2¹¹ = 140947931 is a prime.

It is not a weakly prime, because it can be changed into another prime (140949973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70474989 + 70474990.

It is an arithmetic number, because the mean of its divisors is an integer number (70474990).

Almost surely, 2^140949979 is an apocalyptic number.

140949979 is a deficient number, since it is larger than the sum of its proper divisors (1).

140949979 is an equidigital number, since it uses as much as digits as its factorization.

140949979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 52.

The square root of 140949979 is about 11872.2356361386. The cubic root of 140949979 is about 520.4212304321.

The spelling of 140949979 in words is "one hundred forty million, nine hundred forty-nine thousand, nine hundred seventy-nine".