671647351 has 2 divisors, whose sum is σ = 671647352. Its totient is φ = 671647350.

The previous prime is 671647313. The next prime is 671647369. The reversal of 671647351 is 153746176.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 671647351 - 2¹⁵ = 671614583 is a prime.

It is a super-2 number, since 2×671647351² = 902220328210634402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671647391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335823675 + 335823676.

It is an arithmetic number, because the mean of its divisors is an integer number (335823676).

Almost surely, 2^671647351 is an apocalyptic number.

671647351 is a deficient number, since it is larger than the sum of its proper divisors (1).

671647351 is an equidigital number, since it uses as much as digits as its factorization.

671647351 is an evil number, because the sum of its binary digits is even.

The product of its digits is 105840, while the sum is 40.

The square root of 671647351 is about 25916.1600357769. The cubic root of 671647351 is about 875.7505836042.

The spelling of 671647351 in words is "six hundred seventy-one million, six hundred forty-seven thousand, three hundred fifty-one".