40208723903 has 4 divisors (see below), whose sum is σ = 41189424528. Its totient is φ = 39228023280.

The previous prime is 40208723899. The next prime is 40208723923. The reversal of 40208723903 is 30932780204.

It is a happy number.

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 40208723903 - 2² = 40208723899 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 (40208723923) 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, 490350251 + ... + 490350332.

It is an arithmetic number, because the mean of its divisors is an integer number (10297356132).

Almost surely, 2^40208723903 is an apocalyptic number.

40208723903 is a deficient number, since it is larger than the sum of its proper divisors (980700625).

40208723903 is an equidigital number, since it uses as much as digits as its factorization.

40208723903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980700624.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 40208723903 in words is "forty billion, two hundred eight million, seven hundred twenty-three thousand, nine hundred three".