1671478859 has 2 divisors, whose sum is σ = 1671478860. Its totient is φ = 1671478858.

The previous prime is 1671478847. The next prime is 1671478867. The reversal of 1671478859 is 9588741761.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1671478859 - 2¹⁶ = 1671413323 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1671478819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835739429 + 835739430.

It is an arithmetic number, because the mean of its divisors is an integer number (835739430).

Almost surely, 2^1671478859 is an apocalyptic number.

1671478859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671478859 is an equidigital number, since it uses as much as digits as its factorization.

1671478859 is an evil number, because the sum of its binary digits is even.

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

The square root of 1671478859 is about 40883.7236440127. The cubic root of 1671478859 is about 1186.7711019987.

The spelling of 1671478859 in words is "one billion, six hundred seventy-one million, four hundred seventy-eight thousand, eight hundred fifty-nine".