418828409 has 2 divisors, whose sum is σ = 418828410. Its totient is φ = 418828408.

The previous prime is 418828387. The next prime is 418828441. The reversal of 418828409 is 904828814.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417303184 + 1525225 = 20428^2 + 1235^2 .

It is a cyclic number.

It is not a de Polignac number, because 418828409 - 2¹² = 418824313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 418828409.

It is not a weakly prime, because it can be changed into another prime (418828009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209414204 + 209414205.

It is an arithmetic number, because the mean of its divisors is an integer number (209414205).

Almost surely, 2^418828409 is an apocalyptic number.

It is an amenable number.

418828409 is a deficient number, since it is larger than the sum of its proper divisors (1).

418828409 is an equidigital number, since it uses as much as digits as its factorization.

418828409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 147456, while the sum is 44.

The square root of 418828409 is about 20465.2976767991. The cubic root of 418828409 is about 748.1902493232.

The spelling of 418828409 in words is "four hundred eighteen million, eight hundred twenty-eight thousand, four hundred nine".