40663603 has 2 divisors, whose sum is σ = 40663604. Its totient is φ = 40663602.

The previous prime is 40663589. The next prime is 40663613. The reversal of 40663603 is 30636604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40663603 - 2²⁵ = 7109171 is a prime.

It is equal to p_2471527 and since 40663603 and 2471527 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40663613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20331801 + 20331802.

It is an arithmetic number, because the mean of its divisors is an integer number (20331802).

Almost surely, 2^40663603 is an apocalyptic number.

40663603 is a deficient number, since it is larger than the sum of its proper divisors (1).

40663603 is an equidigital number, since it uses as much as digits as its factorization.

40663603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 40663603 is about 6376.8019414123. The cubic root of 40663603 is about 343.8760680077.

It can be divided in two parts, 406 and 63603, that added together give a square (64009 = 253²).

The spelling of 40663603 in words is "forty million, six hundred sixty-three thousand, six hundred three".