1671859487 has 2 divisors, whose sum is σ = 1671859488. Its totient is φ = 1671859486.

The previous prime is 1671859429. The next prime is 1671859499. The reversal of 1671859487 is 7849581761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1671859487 - 2²⁴ = 1655082271 is a prime.

It is a super-2 number, since 2×1671859487² = 5590228288543806338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671859187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835929743 + 835929744.

It is an arithmetic number, because the mean of its divisors is an integer number (835929744).

Almost surely, 2^1671859487 is an apocalyptic number.

1671859487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671859487 is an equidigital number, since it uses as much as digits as its factorization.

1671859487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3386880, while the sum is 56.

The square root of 1671859487 is about 40888.3783855511. The cubic root of 1671859487 is about 1186.8611787242.

The spelling of 1671859487 in words is "one billion, six hundred seventy-one million, eight hundred fifty-nine thousand, four hundred eighty-seven".