40396903 has 2 divisors, whose sum is σ = 40396904. Its totient is φ = 40396902.

The previous prime is 40396897. The next prime is 40396921. The reversal of 40396903 is 30969304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40396903 - 2⁵ = 40396871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40396963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20198451 + 20198452.

It is an arithmetic number, because the mean of its divisors is an integer number (20198452).

Almost surely, 2^40396903 is an apocalyptic number.

40396903 is a deficient number, since it is larger than the sum of its proper divisors (1).

40396903 is an equidigital number, since it uses as much as digits as its factorization.

40396903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 34.

The square root of 40396903 is about 6355.8558039024. The cubic root of 40396903 is about 343.1226261306.

The spelling of 40396903 in words is "forty million, three hundred ninety-six thousand, nine hundred three".