40603 has 4 divisors (see below), whose sum is σ = 42760. Its totient is φ = 38448.

The previous prime is 40597. The next prime is 40609. The reversal of 40603 is 30604.

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

It is an interprime number because it is at equal distance from previous prime (40597) and next prime (40609).

It is a cyclic number.

It is not a de Polignac number, because 40603 - 2¹³ = 32411 is a prime.

It is the 202-nd Hogben number.

It is a Duffinian number.

40603 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (40609) by changing a digit.

It is a nontrivial repunit in base 201.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1050 + ... + 1087.

It is an arithmetic number, because the mean of its divisors is an integer number (10690).

2⁴⁰⁶⁰³ is an apocalyptic number.

40603 is a deficient number, since it is larger than the sum of its proper divisors (2157).

40603 is a wasteful number, since it uses less digits than its factorization.

40603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2156.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 40603 is about 201.5018610336. The cubic root of 40603 is about 34.3705151174.

Subtracting from 40603 its reverse (30604), we obtain a palindrome (9999).

The spelling of 40603 in words is "forty thousand, six hundred three".