418471649 has 2 divisors, whose sum is σ = 418471650. Its totient is φ = 418471648.

The previous prime is 418471639. The next prime is 418471667. The reversal of 418471649 is 946174814.

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., 303874624 + 114597025 = 17432^2 + 10705^2 .

It is a cyclic number.

It is not a de Polignac number, because 418471649 - 2²⁸ = 150036193 is a prime.

It is not a weakly prime, because it can be changed into another prime (418471639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209235824 + 209235825.

It is an arithmetic number, because the mean of its divisors is an integer number (209235825).

Almost surely, 2^418471649 is an apocalyptic number.

It is an amenable number.

418471649 is a deficient number, since it is larger than the sum of its proper divisors (1).

418471649 is an equidigital number, since it uses as much as digits as its factorization.

418471649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 418471649 is about 20456.5796016832. The cubic root of 418471649 is about 747.9777516570.

The spelling of 418471649 in words is "four hundred eighteen million, four hundred seventy-one thousand, six hundred forty-nine".