40687859 has 2 divisors, whose sum is σ = 40687860. Its totient is φ = 40687858.

The previous prime is 40687771. The next prime is 40687891. The reversal of 40687859 is 95878604.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40687859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40687459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20343929 + 20343930.

It is an arithmetic number, because the mean of its divisors is an integer number (20343930).

Almost surely, 2^40687859 is an apocalyptic number.

40687859 is a deficient number, since it is larger than the sum of its proper divisors (1).

40687859 is an equidigital number, since it uses as much as digits as its factorization.

40687859 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 47.

The square root of 40687859 is about 6378.7035516631. The cubic root of 40687859 is about 343.9444288951.

The spelling of 40687859 in words is "forty million, six hundred eighty-seven thousand, eight hundred fifty-nine".