413665261 has 2 divisors, whose sum is σ = 413665262. Its totient is φ = 413665260.

The previous prime is 413665253. The next prime is 413665361. The reversal of 413665261 is 162566314.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305900100 + 107765161 = 17490^2 + 10381^2 .

It is a cyclic number.

It is not a de Polignac number, because 413665261 - 2³ = 413665253 is a prime.

It is a super-2 number, since 2×413665261² = 342237896316396242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (413665211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 206832630 + 206832631.

It is an arithmetic number, because the mean of its divisors is an integer number (206832631).

Almost surely, 2^413665261 is an apocalyptic number.

It is an amenable number.

413665261 is a deficient number, since it is larger than the sum of its proper divisors (1).

413665261 is an equidigital number, since it uses as much as digits as its factorization.

413665261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 34.

The square root of 413665261 is about 20338.7625238115. The cubic root of 413665261 is about 745.1030657823.

The spelling of 413665261 in words is "four hundred thirteen million, six hundred sixty-five thousand, two hundred sixty-one".