41781109 has 2 divisors, whose sum is σ = 41781110. Its totient is φ = 41781108.

The previous prime is 41781097. The next prime is 41781143. The reversal of 41781109 is 90118714.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38254225 + 3526884 = 6185^2 + 1878^2 .

It is a cyclic number.

It is not a de Polignac number, because 41781109 - 2¹¹ = 41779061 is a prime.

It is a super-2 number, since 2×41781109² = 3491322138539762, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41781709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20890554 + 20890555.

It is an arithmetic number, because the mean of its divisors is an integer number (20890555).

Almost surely, 2^41781109 is an apocalyptic number.

It is an amenable number.

41781109 is a deficient number, since it is larger than the sum of its proper divisors (1).

41781109 is an equidigital number, since it uses as much as digits as its factorization.

41781109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 41781109 is about 6463.8308300883. The cubic root of 41781109 is about 346.9977465547.

The spelling of 41781109 in words is "forty-one million, seven hundred eighty-one thousand, one hundred nine".