1671880489 has 2 divisors, whose sum is σ = 1671880490. Its totient is φ = 1671880488.

The previous prime is 1671880481. The next prime is 1671880501. The reversal of 1671880489 is 9840881761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 966712464 + 705168025 = 31092^2 + 26555^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671880489 - 2³ = 1671880481 is a prime.

It is not a weakly prime, because it can be changed into another prime (1671880481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835940244 + 835940245.

It is an arithmetic number, because the mean of its divisors is an integer number (835940245).

Almost surely, 2^1671880489 is an apocalyptic number.

It is an amenable number.

1671880489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671880489 is an equidigital number, since it uses as much as digits as its factorization.

1671880489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 774144, while the sum is 52.

The square root of 1671880489 is about 40888.6352058858. The cubic root of 1671880489 is about 1186.8661485107.

The spelling of 1671880489 in words is "one billion, six hundred seventy-one million, eight hundred eighty thousand, four hundred eighty-nine".