140399979 has 16 divisors (see below), whose sum is σ = 191011584. Its totient is φ = 91706400.

The previous prime is 140399971. The next prime is 140399983. The reversal of 140399979 is 979993041.

It is not a de Polignac number, because 140399979 - 2³ = 140399971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140399971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50434 + ... + 53144.

It is an arithmetic number, because the mean of its divisors is an integer number (11938224).

Almost surely, 2^140399979 is an apocalyptic number.

140399979 is a deficient number, since it is larger than the sum of its proper divisors (50611605).

140399979 is a wasteful number, since it uses less digits than its factorization.

140399979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3058.

The product of its (nonzero) digits is 551124, while the sum is 51.

The square root of 140399979 is about 11849.0497087319. The cubic root of 140399979 is about 519.7434372914.

The spelling of 140399979 in words is "one hundred forty million, three hundred ninety-nine thousand, nine hundred seventy-nine".