406918441 has 2 divisors, whose sum is σ = 406918442. Its totient is φ = 406918440.

The previous prime is 406918427. The next prime is 406918451. The reversal of 406918441 is 144819604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 387302400 + 19616041 = 19680^2 + 4429^2 .

It is a cyclic number.

It is not a de Polignac number, because 406918441 - 2⁷ = 406918313 is a prime.

It is equal to p_21685393 and since 406918441 and 21685393 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 406918441.

It is not a weakly prime, because it can be changed into another prime (406918411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203459220 + 203459221.

It is an arithmetic number, because the mean of its divisors is an integer number (203459221).

Almost surely, 2^406918441 is an apocalyptic number.

It is an amenable number.

406918441 is a deficient number, since it is larger than the sum of its proper divisors (1).

406918441 is an equidigital number, since it uses as much as digits as its factorization.

406918441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 406918441 is about 20172.2195357873. The cubic root of 406918441 is about 741.0300004305.

The spelling of 406918441 in words is "four hundred six million, nine hundred eighteen thousand, four hundred forty-one".