40303999 has 4 divisors (see below), whose sum is σ = 41604160. Its totient is φ = 39003840.

The previous prime is 40303993. The next prime is 40304041. The reversal of 40303999 is 99930304.

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 40303999 - 2⁷ = 40303871 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 (40303993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 650034 + ... + 650095.

It is an arithmetic number, because the mean of its divisors is an integer number (10401040).

Almost surely, 2^40303999 is an apocalyptic number.

40303999 is a deficient number, since it is larger than the sum of its proper divisors (1300161).

40303999 is a wasteful number, since it uses less digits than its factorization.

40303999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1300160.

The product of its (nonzero) digits is 26244, while the sum is 37.

The square root of 40303999 is about 6348.5430612070. The cubic root of 40303999 is about 342.8593886840.

The spelling of 40303999 in words is "forty million, three hundred three thousand, nine hundred ninety-nine".