41899991 has 16 divisors (see below), whose sum is σ = 49808640. Its totient is φ = 34499520.

The previous prime is 41899987. The next prime is 41900059. The reversal of 41899991 is 19999814.

41899991 = 230² + 231² + ... + 516².

It is a cyclic number.

It is not a de Polignac number, because 41899991 - 2² = 41899987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41899391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18140 + ... + 20318.

It is an arithmetic number, because the mean of its divisors is an integer number (3113040).

Almost surely, 2^41899991 is an apocalyptic number.

41899991 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

41899991 is a deficient number, since it is larger than the sum of its proper divisors (7908649).

41899991 is a wasteful number, since it uses less digits than its factorization.

41899991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294.

The product of its digits is 209952, while the sum is 50.

The square root of 41899991 is about 6473.0202378797. The cubic root of 41899991 is about 347.3265452513.

The spelling of 41899991 in words is "forty-one million, eight hundred ninety-nine thousand, nine hundred ninety-one".