40979 has 4 divisors (see below), whose sum is σ = 41976. Its totient is φ = 39984.

The previous prime is 40973. The next prime is 40993. The reversal of 40979 is 97904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40979 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 40979.

It is not an unprimeable number, because it can be changed into a prime (40973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 434 + ... + 519.

It is an arithmetic number, because the mean of its divisors is an integer number (10494).

2⁴⁰⁹⁷⁹ is an apocalyptic number.

40979 is a deficient number, since it is larger than the sum of its proper divisors (997).

40979 is an equidigital number, since it uses as much as digits as its factorization.

40979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 40979 is about 202.4327048676. The cubic root of 40979 is about 34.4762841982.

The spelling of 40979 in words is "forty thousand, nine hundred seventy-nine".