413631661 has 2 divisors, whose sum is σ = 413631662. Its totient is φ = 413631660.

The previous prime is 413631601. The next prime is 413631677. The reversal of 413631661 is 166136314.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 253128100 + 160503561 = 15910^2 + 12669^2 .

It is a cyclic number.

It is not a de Polignac number, because 413631661 - 2¹¹ = 413629613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (413631601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206815830 + 206815831.

It is an arithmetic number, because the mean of its divisors is an integer number (206815831).

Almost surely, 2^413631661 is an apocalyptic number.

It is an amenable number.

413631661 is a deficient number, since it is larger than the sum of its proper divisors (1).

413631661 is an equidigital number, since it uses as much as digits as its factorization.

413631661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 31.

The square root of 413631661 is about 20337.9364980816. The cubic root of 413631661 is about 745.0828915471.

Adding to 413631661 its reverse (166136314), we get a palindrome (579767975).

The spelling of 413631661 in words is "four hundred thirteen million, six hundred thirty-one thousand, six hundred sixty-one".