40187663 has 2 divisors, whose sum is σ = 40187664. Its totient is φ = 40187662.

The previous prime is 40187627. The next prime is 40187689. The reversal of 40187663 is 36678104.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40187663 - 2⁶ = 40187599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40187363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20093831 + 20093832.

It is an arithmetic number, because the mean of its divisors is an integer number (20093832).

Almost surely, 2^40187663 is an apocalyptic number.

40187663 is a deficient number, since it is larger than the sum of its proper divisors (1).

40187663 is an equidigital number, since it uses as much as digits as its factorization.

40187663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 40187663 is about 6339.3740227250. The cubic root of 40187663 is about 342.5291871338.

The spelling of 40187663 in words is "forty million, one hundred eighty-seven thousand, six hundred sixty-three".