409146641 has 4 divisors (see below), whose sum is σ = 409199652. Its totient is φ = 409093632.

The previous prime is 409146637. The next prime is 409146643. The reversal of 409146641 is 146641904.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 218596225 + 190550416 = 14785^2 + 13804^2 .

It is a cyclic number.

It is not a de Polignac number, because 409146641 - 2² = 409146637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (409146643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12440 + ... + 31193.

It is an arithmetic number, because the mean of its divisors is an integer number (102299913).

Almost surely, 2^409146641 is an apocalyptic number.

It is an amenable number.

409146641 is a deficient number, since it is larger than the sum of its proper divisors (53011).

409146641 is an equidigital number, since it uses as much as digits as its factorization.

409146641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53010.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 409146641 is about 20227.3735566435. The cubic root of 409146641 is about 742.3801140393.

The spelling of 409146641 in words is "four hundred nine million, one hundred forty-six thousand, six hundred forty-one".