41691919 has 2 divisors, whose sum is σ = 41691920. Its totient is φ = 41691918.

The previous prime is 41691917. The next prime is 41691943. The reversal of 41691919 is 91919614.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 41691919 - 2¹ = 41691917 is a prime.

It is a super-2 number, since 2×41691919² = 3476432219805122, which contains 22 as substring.

Together with 41691917, 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 (41691911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20845959 + 20845960.

It is an arithmetic number, because the mean of its divisors is an integer number (20845960).

Almost surely, 2^41691919 is an apocalyptic number.

41691919 is a deficient number, since it is larger than the sum of its proper divisors (1).

41691919 is an equidigital number, since it uses as much as digits as its factorization.

41691919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 40.

The square root of 41691919 is about 6456.9279847308. The cubic root of 41691919 is about 346.7506589916.

It can be divided in two parts, 4 and 1691919, that multiplied together give a palindrome (6767676).

The spelling of 41691919 in words is "forty-one million, six hundred ninety-one thousand, nine hundred nineteen".