40402903 has 2 divisors, whose sum is σ = 40402904. Its totient is φ = 40402902.

The previous prime is 40402877. The next prime is 40402933. The reversal of 40402903 is 30920404.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40402903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40402933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20201451 + 20201452.

It is an arithmetic number, because the mean of its divisors is an integer number (20201452).

Almost surely, 2^40402903 is an apocalyptic number.

40402903 is a deficient number, since it is larger than the sum of its proper divisors (1).

40402903 is an equidigital number, since it uses as much as digits as its factorization.

40402903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 40402903 is about 6356.3277920510. The cubic root of 40402903 is about 343.1396128605.

The spelling of 40402903 in words is "forty million, four hundred two thousand, nine hundred three".