40279 has 4 divisors (see below), whose sum is σ = 41184. Its totient is φ = 39376.

The previous prime is 40277. The next prime is 40283. The reversal of 40279 is 97204.

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 40279 - 2¹ = 40277 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 (40277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382 + ... + 475.

It is an arithmetic number, because the mean of its divisors is an integer number (10296).

2⁴⁰²⁷⁹ is an apocalyptic number.

40279 is a deficient number, since it is larger than the sum of its proper divisors (905).

40279 is an equidigital number, since it uses as much as digits as its factorization.

40279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 40279 is about 200.6962879577. The cubic root of 40279 is about 34.2788486583.

The spelling of 40279 in words is "forty thousand, two hundred seventy-nine".