418211957 has 2 divisors, whose sum is σ = 418211958. Its totient is φ = 418211956.

The previous prime is 418211953. The next prime is 418211971. The reversal of 418211957 is 759112814.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 335292721 + 82919236 = 18311^2 + 9106^2 .

It is a cyclic number.

It is not a de Polignac number, because 418211957 - 2² = 418211953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 418211957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (418211953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 209105978 + 209105979.

It is an arithmetic number, because the mean of its divisors is an integer number (209105979).

Almost surely, 2^418211957 is an apocalyptic number.

It is an amenable number.

418211957 is a deficient number, since it is larger than the sum of its proper divisors (1).

418211957 is an equidigital number, since it uses as much as digits as its factorization.

418211957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 38.

The square root of 418211957 is about 20450.2312211867. The cubic root of 418211957 is about 747.8229948306.

The spelling of 418211957 in words is "four hundred eighteen million, two hundred eleven thousand, nine hundred fifty-seven".