671826457 has 2 divisors, whose sum is σ = 671826458. Its totient is φ = 671826456.

The previous prime is 671826443. The next prime is 671826473. The reversal of 671826457 is 754628176.

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., 490223881 + 181602576 = 22141^2 + 13476^2 .

It is a cyclic number.

It is not a de Polignac number, because 671826457 - 2⁷ = 671826329 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (671826157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335913228 + 335913229.

It is an arithmetic number, because the mean of its divisors is an integer number (335913229).

Almost surely, 2^671826457 is an apocalyptic number.

It is an amenable number.

671826457 is a deficient number, since it is larger than the sum of its proper divisors (1).

671826457 is an equidigital number, since it uses as much as digits as its factorization.

671826457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The square root of 671826457 is about 25919.6152942130. The cubic root of 671826457 is about 875.8284211993.

The spelling of 671826457 in words is "six hundred seventy-one million, eight hundred twenty-six thousand, four hundred fifty-seven".