671111401 has 2 divisors, whose sum is σ = 671111402. Its totient is φ = 671111400.

The previous prime is 671111333. The next prime is 671111443. The reversal of 671111401 is 104111176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 670810000 + 301401 = 25900^2 + 549^2 .

It is a cyclic number.

It is not a de Polignac number, because 671111401 - 2¹¹ = 671109353 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671111491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335555700 + 335555701.

It is an arithmetic number, because the mean of its divisors is an integer number (335555701).

Almost surely, 2^671111401 is an apocalyptic number.

It is an amenable number.

671111401 is a deficient number, since it is larger than the sum of its proper divisors (1).

671111401 is an equidigital number, since it uses as much as digits as its factorization.

671111401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 671111401 is about 25905.8178986883. The cubic root of 671111401 is about 875.5175826483.

Adding to 671111401 its reverse (104111176), we get a palindrome (775222577).

The spelling of 671111401 in words is "six hundred seventy-one million, one hundred eleven thousand, four hundred one".