40687837 has 4 divisors (see below), whose sum is σ = 40780960. Its totient is φ = 40594716.

The previous prime is 40687771. The next prime is 40687859. The reversal of 40687837 is 73878604.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40687837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40687793 and 40687802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40687337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45903 + ... + 46780.

It is an arithmetic number, because the mean of its divisors is an integer number (10195240).

Almost surely, 2^40687837 is an apocalyptic number.

It is an amenable number.

40687837 is a deficient number, since it is larger than the sum of its proper divisors (93123).

40687837 is an equidigital number, since it uses as much as digits as its factorization.

40687837 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93122.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 40687837 is about 6378.7018271746. The cubic root of 40687837 is about 343.9443669047.

The spelling of 40687837 in words is "forty million, six hundred eighty-seven thousand, eight hundred thirty-seven".