411991 has 2 divisors, whose sum is σ = 411992. Its totient is φ = 411990.

The previous prime is 411967. The next prime is 412001. The reversal of 411991 is 199114.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 411991 - 2⁹ = 411479 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (411941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 205995 + 205996.

It is an arithmetic number, because the mean of its divisors is an integer number (205996).

2⁴¹¹⁹⁹¹ is an apocalyptic number.

411991 is a deficient number, since it is larger than the sum of its proper divisors (1).

411991 is an equidigital number, since it uses as much as digits as its factorization.

411991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324, while the sum is 25.

The square root of 411991 is about 641.8652506562. The cubic root of 411991 is about 74.4096467817.

The spelling of 411991 in words is "four hundred eleven thousand, nine hundred ninety-one".