40837987 has 2 divisors, whose sum is σ = 40837988. Its totient is φ = 40837986.

The previous prime is 40837963. The next prime is 40837991. The reversal of 40837987 is 78973804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40837987 is a prime.

It is not a weakly prime, because it can be changed into another prime (40837957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20418993 + 20418994.

It is an arithmetic number, because the mean of its divisors is an integer number (20418994).

Almost surely, 2^40837987 is an apocalyptic number.

40837987 is a deficient number, since it is larger than the sum of its proper divisors (1).

40837987 is an equidigital number, since it uses as much as digits as its factorization.

40837987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 40837987 is about 6390.4606250254. The cubic root of 40837987 is about 344.3669325835.

The spelling of 40837987 in words is "forty million, eight hundred thirty-seven thousand, nine hundred eighty-seven".