418136861 has 2 divisors, whose sum is σ = 418136862. Its totient is φ = 418136860.

The previous prime is 418136839. The next prime is 418136867. The reversal of 418136861 is 168631814.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230857636 + 187279225 = 15194^2 + 13685^2 .

It is a cyclic number.

It is not a de Polignac number, because 418136861 - 2¹⁴ = 418120477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (418136867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209068430 + 209068431.

It is an arithmetic number, because the mean of its divisors is an integer number (209068431).

Almost surely, 2^418136861 is an apocalyptic number.

It is an amenable number.

418136861 is a deficient number, since it is larger than the sum of its proper divisors (1).

418136861 is an equidigital number, since it uses as much as digits as its factorization.

418136861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 38.

The square root of 418136861 is about 20448.3950714964. The cubic root of 418136861 is about 747.7782313430.

The spelling of 418136861 in words is "four hundred eighteen million, one hundred thirty-six thousand, eight hundred sixty-one".