40679 has 4 divisors (see below), whose sum is σ = 42840. Its totient is φ = 38520.

The previous prime is 40639. The next prime is 40693. The reversal of 40679 is 97604.

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

It is a cyclic number.

It is not a de Polignac number, because 40679 - 2⁸ = 40423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40609) 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 3 ways as a sum of consecutive naturals, for example, 1052 + ... + 1089.

It is an arithmetic number, because the mean of its divisors is an integer number (10710).

2⁴⁰⁶⁷⁹ is an apocalyptic number.

40679 is a deficient number, since it is larger than the sum of its proper divisors (2161).

40679 is a wasteful number, since it uses less digits than its factorization.

40679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2160.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 40679 is about 201.6903567353. The cubic root of 40679 is about 34.3919464652.

The spelling of 40679 in words is "forty thousand, six hundred seventy-nine".