1671258377 has 2 divisors, whose sum is σ = 1671258378. Its totient is φ = 1671258376.

The previous prime is 1671258349. The next prime is 1671258403. The reversal of 1671258377 is 7738521761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1185011776 + 486246601 = 34424^2 + 22051^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671258377 - 2¹⁰ = 1671257353 is a prime.

It is not a weakly prime, because it can be changed into another prime (1671258077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835629188 + 835629189.

It is an arithmetic number, because the mean of its divisors is an integer number (835629189).

Almost surely, 2^1671258377 is an apocalyptic number.

It is an amenable number.

1671258377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671258377 is an equidigital number, since it uses as much as digits as its factorization.

1671258377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 493920, while the sum is 47.

The square root of 1671258377 is about 40881.0271030462. The cubic root of 1671258377 is about 1186.7189180358.

The spelling of 1671258377 in words is "one billion, six hundred seventy-one million, two hundred fifty-eight thousand, three hundred seventy-seven".