40781903 has 4 divisors (see below), whose sum is σ = 41356368. Its totient is φ = 40207440.

The previous prime is 40781893. The next prime is 40781911. The reversal of 40781903 is 30918704.

40781903 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 40781903 - 2⁴ = 40781887 is a prime.

It is a super-2 number, since 2×40781903² = 3326327224602818, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40781903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40781003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287126 + ... + 287267.

It is an arithmetic number, because the mean of its divisors is an integer number (10339092).

Almost surely, 2^40781903 is an apocalyptic number.

40781903 is a deficient number, since it is larger than the sum of its proper divisors (574465).

40781903 is an equidigital number, since it uses as much as digits as its factorization.

40781903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574464.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 40781903 is about 6386.0710143248. The cubic root of 40781903 is about 344.2092173085.

The spelling of 40781903 in words is "forty million, seven hundred eighty-one thousand, nine hundred three".