1671671747 has 2 divisors, whose sum is σ = 1671671748. Its totient is φ = 1671671746.

The previous prime is 1671671731. The next prime is 1671671779. The reversal of 1671671747 is 7471761761.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1671671747 - 2⁴ = 1671671731 is a prime.

It is not a weakly prime, because it can be changed into another prime (1671671347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835835873 + 835835874.

It is an arithmetic number, because the mean of its divisors is an integer number (835835874).

Almost surely, 2^1671671747 is an apocalyptic number.

1671671747 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671671747 is an equidigital number, since it uses as much as digits as its factorization.

1671671747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 345744, while the sum is 47.

The square root of 1671671747 is about 40886.0825587387. The cubic root of 1671671747 is about 1186.8167512149.

The spelling of 1671671747 in words is "one billion, six hundred seventy-one million, six hundred seventy-one thousand, seven hundred forty-seven".