40864487 has 2 divisors, whose sum is σ = 40864488. Its totient is φ = 40864486.

The previous prime is 40864441. The next prime is 40864489. The reversal of 40864487 is 78446804.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40864487 - 2¹⁰ = 40863463 is a prime.

Together with 40864489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40864489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20432243 + 20432244.

It is an arithmetic number, because the mean of its divisors is an integer number (20432244).

Almost surely, 2^40864487 is an apocalyptic number.

40864487 is a deficient number, since it is larger than the sum of its proper divisors (1).

40864487 is an equidigital number, since it uses as much as digits as its factorization.

40864487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 40864487 is about 6392.5336917376. The cubic root of 40864487 is about 344.4414036923.

The spelling of 40864487 in words is "forty million, eight hundred sixty-four thousand, four hundred eighty-seven".