140615979 has 16 divisors (see below), whose sum is σ = 225550080. Its totient is φ = 76122720.

The previous prime is 140615933. The next prime is 140615989. The reversal of 140615979 is 979516041.

It is not a de Polignac number, because 140615979 - 2¹⁷ = 140484907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 140615979.

It is not an unprimeable number, because it can be changed into a prime (140615929) 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 in 15 ways as a sum of consecutive naturals, for example, 175812 + ... + 176609.

It is an arithmetic number, because the mean of its divisors is an integer number (14096880).

Almost surely, 2^140615979 is an apocalyptic number.

140615979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

140615979 is a deficient number, since it is larger than the sum of its proper divisors (84934101).

140615979 is a wasteful number, since it uses less digits than its factorization.

140615979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352450.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 140615979 is about 11858.1608607743. The cubic root of 140615979 is about 520.0098358593.

The spelling of 140615979 in words is "one hundred forty million, six hundred fifteen thousand, nine hundred seventy-nine".