40000687 has 2 divisors, whose sum is σ = 40000688. Its totient is φ = 40000686.

The previous prime is 40000669. The next prime is 40000691. The reversal of 40000687 is 78600004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40000687 - 2²³ = 31612079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40000627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20000343 + 20000344.

It is an arithmetic number, because the mean of its divisors is an integer number (20000344).

Almost surely, 2^40000687 is an apocalyptic number.

40000687 is a deficient number, since it is larger than the sum of its proper divisors (1).

40000687 is an equidigital number, since it uses as much as digits as its factorization.

40000687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 40000687 is about 6324.6096322224. The cubic root of 40000687 is about 341.9971472466.

The spelling of 40000687 in words is "forty million, six hundred eighty-seven", and thus it is an aban number.