41999991 has 16 divisors (see below), whose sum is σ = 61218048. Its totient is φ = 25401600.

The previous prime is 41999987. The next prime is 42000011. The reversal of 41999991 is 19999914.

It is not a de Polignac number, because 41999991 - 2² = 41999987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41999591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19815 + ... + 21831.

It is an arithmetic number, because the mean of its divisors is an integer number (3826128).

Almost surely, 2^41999991 is an apocalyptic number.

41999991 is a deficient number, since it is larger than the sum of its proper divisors (19218057).

41999991 is a wasteful number, since it uses less digits than its factorization.

41999991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2662.

The product of its digits is 236196, while the sum is 51.

The square root of 41999991 is about 6480.7400040427. The cubic root of 41999991 is about 347.6026396599.

The spelling of 41999991 in words is "forty-one million, nine hundred ninety-nine thousand, nine hundred ninety-one".