41781913 has 2 divisors, whose sum is σ = 41781914. Its totient is φ = 41781912.

The previous prime is 41781907. The next prime is 41781941. The reversal of 41781913 is 31918714.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41576704 + 205209 = 6448^2 + 453^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-41781913 is a prime.

It is not a weakly prime, because it can be changed into another prime (41781973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20890956 + 20890957.

It is an arithmetic number, because the mean of its divisors is an integer number (20890957).

Almost surely, 2^41781913 is an apocalyptic number.

It is an amenable number.

41781913 is a deficient number, since it is larger than the sum of its proper divisors (1).

41781913 is an equidigital number, since it uses as much as digits as its factorization.

41781913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 34.

The square root of 41781913 is about 6463.8930220108. The cubic root of 41781913 is about 346.9999723166. Note that the first 4 decimals are identical.

The spelling of 41781913 in words is "forty-one million, seven hundred eighty-one thousand, nine hundred thirteen".