40645003 has 4 divisors (see below), whose sum is σ = 46451440. Its totient is φ = 34838568.

The previous prime is 40644997. The next prime is 40645021. The reversal of 40645003 is 30054604.

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 40645003 - 2⁹ = 40644491 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40645103) 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, 2903208 + ... + 2903221.

It is an arithmetic number, because the mean of its divisors is an integer number (11612860).

Almost surely, 2^40645003 is an apocalyptic number.

40645003 is a deficient number, since it is larger than the sum of its proper divisors (5806437).

40645003 is an equidigital number, since it uses as much as digits as its factorization.

40645003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5806436.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 40645003 is about 6375.3433633021. The cubic root of 40645003 is about 343.8236290544.

Adding to 40645003 its reverse (30054604), we get a palindrome (70699607).

The spelling of 40645003 in words is "forty million, six hundred forty-five thousand, three".