40961687 has 16 divisors (see below), whose sum is σ = 47365920. Its totient is φ = 35085312.

The previous prime is 40961681. The next prime is 40961731. The reversal of 40961687 is 78616904.

It is a cyclic number.

It is not a de Polignac number, because 40961687 - 2⁶ = 40961623 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40961681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14864 + ... + 17402.

It is an arithmetic number, because the mean of its divisors is an integer number (2960370).

Almost surely, 2^40961687 is an apocalyptic number.

40961687 is a deficient number, since it is larger than the sum of its proper divisors (6404233).

40961687 is a wasteful number, since it uses less digits than its factorization.

40961687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2642.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 40961687 is about 6400.1317955180. The cubic root of 40961687 is about 344.7142828028.

The spelling of 40961687 in words is "forty million, nine hundred sixty-one thousand, six hundred eighty-seven".