40488491 has 2 divisors, whose sum is σ = 40488492. Its totient is φ = 40488490.

The previous prime is 40488467. The next prime is 40488493. The reversal of 40488491 is 19488404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40488491 is a prime.

It is a Sophie Germain prime.

Together with 40488493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40488493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20244245 + 20244246.

It is an arithmetic number, because the mean of its divisors is an integer number (20244246).

Almost surely, 2^40488491 is an apocalyptic number.

40488491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40488491 is an equidigital number, since it uses as much as digits as its factorization.

40488491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 40488491 is about 6363.0567339919. The cubic root of 40488491 is about 343.3817400145.

The spelling of 40488491 in words is "forty million, four hundred eighty-eight thousand, four hundred ninety-one".