140311979 has 8 divisors (see below), whose sum is σ = 149568000. Its totient is φ = 131243112.

The previous prime is 140311973. The next prime is 140311981. The reversal of 140311979 is 979113041.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 140311979 - 2¹² = 140307883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140311973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45239 + ... + 48240.

It is an arithmetic number, because the mean of its divisors is an integer number (18696000).

Almost surely, 2^140311979 is an apocalyptic number.

140311979 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

140311979 is a deficient number, since it is larger than the sum of its proper divisors (9256021).

140311979 is an equidigital number, since it uses as much as digits as its factorization.

140311979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93577.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 140311979 is about 11845.3357487241. The cubic root of 140311979 is about 519.6348262078.

The spelling of 140311979 in words is "one hundred forty million, three hundred eleven thousand, nine hundred seventy-nine".