40193903 has 8 divisors (see below), whose sum is σ = 42569088. Its totient is φ = 37871064.

The previous prime is 40193897. The next prime is 40193917. The reversal of 40193903 is 30939104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-40193903 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 (40193983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11501 + ... + 14582.

It is an arithmetic number, because the mean of its divisors is an integer number (5321136).

Almost surely, 2^40193903 is an apocalyptic number.

40193903 is a deficient number, since it is larger than the sum of its proper divisors (2375185).

40193903 is a wasteful number, since it uses less digits than its factorization.

40193903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26173.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 40193903 is about 6339.8661657798. The cubic root of 40193903 is about 342.5469145602.

The spelling of 40193903 in words is "forty million, one hundred ninety-three thousand, nine hundred three".