41691901 has 2 divisors, whose sum is σ = 41691902. Its totient is φ = 41691900.

The previous prime is 41691899. The next prime is 41691907. The reversal of 41691901 is 10919614.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41602500 + 89401 = 6450^2 + 299^2 .

It is a cyclic number.

It is not a de Polignac number, because 41691901 - 2¹ = 41691899 is a prime.

Together with 41691899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41691907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20845950 + 20845951.

It is an arithmetic number, because the mean of its divisors is an integer number (20845951).

Almost surely, 2^41691901 is an apocalyptic number.

It is an amenable number.

41691901 is a deficient number, since it is larger than the sum of its proper divisors (1).

41691901 is an equidigital number, since it uses as much as digits as its factorization.

41691901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 41691901 is about 6456.9265908790. The cubic root of 41691901 is about 346.7506090897.

The spelling of 41691901 in words is "forty-one million, six hundred ninety-one thousand, nine hundred one".