40913 has 4 divisors (see below), whose sum is σ = 41328. Its totient is φ = 40500.

The previous prime is 40903. The next prime is 40927. The reversal of 40913 is 31904.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 40913 - 2⁴ = 40897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40891 and 40900.

It is not an unprimeable number, because it can be changed into a prime (40903) 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, 38 + ... + 288.

It is an arithmetic number, because the mean of its divisors is an integer number (10332).

2⁴⁰⁹¹³ is an apocalyptic number.

It is an amenable number.

40913 is a deficient number, since it is larger than the sum of its proper divisors (415).

40913 is a wasteful number, since it uses less digits than its factorization.

40913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 40913 is about 202.2696220395. The cubic root of 40913 is about 34.4577653029.

Subtracting from 40913 its reverse (31904), we obtain a palindrome (9009).

The spelling of 40913 in words is "forty thousand, nine hundred thirteen".