415311661 has 2 divisors, whose sum is σ = 415311662. Its totient is φ = 415311660.

The previous prime is 415311613. The next prime is 415311719. The reversal of 415311661 is 166113514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222934761 + 192376900 = 14931^2 + 13870^2 .

It is a cyclic number.

It is not a de Polignac number, because 415311661 - 2¹¹ = 415309613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (415311601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207655830 + 207655831.

It is an arithmetic number, because the mean of its divisors is an integer number (207655831).

Almost surely, 2^415311661 is an apocalyptic number.

It is an amenable number.

415311661 is a deficient number, since it is larger than the sum of its proper divisors (1).

415311661 is an equidigital number, since it uses as much as digits as its factorization.

415311661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 415311661 is about 20379.1967702361. The cubic root of 415311661 is about 746.0902680027.

The spelling of 415311661 in words is "four hundred fifteen million, three hundred eleven thousand, six hundred sixty-one".