40724987 has 2 divisors, whose sum is σ = 40724988. Its totient is φ = 40724986.

The previous prime is 40724977. The next prime is 40724993. The reversal of 40724987 is 78942704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40724987 - 2²⁰ = 39676411 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40724977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20362493 + 20362494.

It is an arithmetic number, because the mean of its divisors is an integer number (20362494).

Almost surely, 2^40724987 is an apocalyptic number.

40724987 is a deficient number, since it is larger than the sum of its proper divisors (1).

40724987 is an equidigital number, since it uses as much as digits as its factorization.

40724987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112896, while the sum is 41.

The square root of 40724987 is about 6381.6131973036. The cubic root of 40724987 is about 344.0490144464.

The spelling of 40724987 in words is "forty million, seven hundred twenty-four thousand, nine hundred eighty-seven".