41787509 has 2 divisors, whose sum is σ = 41787510. Its totient is φ = 41787508.

The previous prime is 41787491. The next prime is 41787511. The reversal of 41787509 is 90578714.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38626225 + 3161284 = 6215^2 + 1778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41787509 is a prime.

Together with 41787511, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41787539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20893754 + 20893755.

It is an arithmetic number, because the mean of its divisors is an integer number (20893755).

Almost surely, 2^41787509 is an apocalyptic number.

It is an amenable number.

41787509 is a deficient number, since it is larger than the sum of its proper divisors (1).

41787509 is an equidigital number, since it uses as much as digits as its factorization.

41787509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 41787509 is about 6464.3258735927. The cubic root of 41787509 is about 347.0154632712.

The spelling of 41787509 in words is "forty-one million, seven hundred eighty-seven thousand, five hundred nine".