40687541 has 2 divisors, whose sum is σ = 40687542. Its totient is φ = 40687540.

The previous prime is 40687481. The next prime is 40687553. The reversal of 40687541 is 14578604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39112516 + 1575025 = 6254^2 + 1255^2 .

It is a cyclic number.

It is not a de Polignac number, because 40687541 - 2¹⁸ = 40425397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40687441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20343770 + 20343771.

It is an arithmetic number, because the mean of its divisors is an integer number (20343771).

Almost surely, 2^40687541 is an apocalyptic number.

It is an amenable number.

40687541 is a deficient number, since it is larger than the sum of its proper divisors (1).

40687541 is an equidigital number, since it uses as much as digits as its factorization.

40687541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 40687541 is about 6378.6786249191. The cubic root of 40687541 is about 343.9435328489.

The spelling of 40687541 in words is "forty million, six hundred eighty-seven thousand, five hundred forty-one".