671405417 has 2 divisors, whose sum is σ = 671405418. Its totient is φ = 671405416.

The previous prime is 671405411. The next prime is 671405453. The reversal of 671405417 is 714504176.

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., 384983641 + 286421776 = 19621^2 + 16924^2 .

It is a cyclic number.

It is not a de Polignac number, because 671405417 - 2⁴ = 671405401 is a prime.

It is not a weakly prime, because it can be changed into another prime (671405411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335702708 + 335702709.

It is an arithmetic number, because the mean of its divisors is an integer number (335702709).

Almost surely, 2^671405417 is an apocalyptic number.

It is an amenable number.

671405417 is a deficient number, since it is larger than the sum of its proper divisors (1).

671405417 is an equidigital number, since it uses as much as digits as its factorization.

671405417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 671405417 is about 25911.4919871473. The cubic root of 671405417 is about 875.6454196437.

The spelling of 671405417 in words is "six hundred seventy-one million, four hundred five thousand, four hundred seventeen".