40816487 has 2 divisors, whose sum is σ = 40816488. Its totient is φ = 40816486.

The previous prime is 40816471. The next prime is 40816493. The reversal of 40816487 is 78461804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40816487 - 2⁴ = 40816471 is a prime.

It is a super-2 number, since 2×40816487² = 3331971222042338, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40816487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40816187) 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, 20408243 + 20408244.

It is an arithmetic number, because the mean of its divisors is an integer number (20408244).

Almost surely, 2^40816487 is an apocalyptic number.

40816487 is a deficient number, since it is larger than the sum of its proper divisors (1).

40816487 is an equidigital number, since it uses as much as digits as its factorization.

40816487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 38.

The square root of 40816487 is about 6388.7782087031. The cubic root of 40816487 is about 344.3064889518.

The spelling of 40816487 in words is "forty million, eight hundred sixteen thousand, four hundred eighty-seven".