40984591 has 2 divisors, whose sum is σ = 40984592. Its totient is φ = 40984590.

The previous prime is 40984583. The next prime is 40984631. The reversal of 40984591 is 19548904.

It is an a-pointer prime, because the next prime (40984631) can be obtained adding 40984591 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40984591 - 2³ = 40984583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40985591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20492295 + 20492296.

It is an arithmetic number, because the mean of its divisors is an integer number (20492296).

Almost surely, 2^40984591 is an apocalyptic number.

40984591 is a deficient number, since it is larger than the sum of its proper divisors (1).

40984591 is an equidigital number, since it uses as much as digits as its factorization.

40984591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 40984591 is about 6401.9208836099. The cubic root of 40984591 is about 344.7785205934.

The spelling of 40984591 in words is "forty million, nine hundred eighty-four thousand, five hundred ninety-one".