411909921 has 16 divisors (see below), whose sum is σ = 636769920. Its totient is φ = 262666800.

The previous prime is 411909919. The next prime is 411909923. The reversal of 411909921 is 129909114.

It is an interprime number because it is at equal distance from previous prime (411909919) and next prime (411909923).

It is not a de Polignac number, because 411909921 - 2¹ = 411909919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (411909923) 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, 331030 + ... + 332271.

It is an arithmetic number, because the mean of its divisors is an integer number (39798120).

Almost surely, 2^411909921 is an apocalyptic number.

It is an amenable number.

411909921 is a deficient number, since it is larger than the sum of its proper divisors (224859999).

411909921 is a wasteful number, since it uses less digits than its factorization.

411909921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663333 (or 663327 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 36.

The square root of 411909921 is about 20295.5640719838. The cubic root of 411909921 is about 744.0476523849.

The spelling of 411909921 in words is "four hundred eleven million, nine hundred nine thousand, nine hundred twenty-one".