40303663 has 2 divisors, whose sum is σ = 40303664. Its totient is φ = 40303662.

The previous prime is 40303657. The next prime is 40303673. The reversal of 40303663 is 36630304.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40303663 - 2⁵ = 40303631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40303643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20151831 + 20151832.

It is an arithmetic number, because the mean of its divisors is an integer number (20151832).

Almost surely, 2^40303663 is an apocalyptic number.

40303663 is a deficient number, since it is larger than the sum of its proper divisors (1).

40303663 is an equidigital number, since it uses as much as digits as its factorization.

40303663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 25.

The square root of 40303663 is about 6348.5165983874. The cubic root of 40303663 is about 342.8584359161.

Adding to 40303663 its reverse (36630304), we get a palindrome (76933967).

The spelling of 40303663 in words is "forty million, three hundred three thousand, six hundred sixty-three".