1670311889 has 4 divisors (see below), whose sum is σ = 1698622320. Its totient is φ = 1642001460.

The previous prime is 1670311883. The next prime is 1670311891. The reversal of 1670311889 is 9881130761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1670311889 - 2²⁰ = 1669263313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1670311883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14155127 + ... + 14155244.

It is an arithmetic number, because the mean of its divisors is an integer number (424655580).

Almost surely, 2^1670311889 is an apocalyptic number.

It is an amenable number.

1670311889 is a deficient number, since it is larger than the sum of its proper divisors (28310431).

1670311889 is an equidigital number, since it uses as much as digits as its factorization.

1670311889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28310430.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1670311889 is about 40869.4493356590. The cubic root of 1670311889 is about 1186.4948498855.

The spelling of 1670311889 in words is "one billion, six hundred seventy million, three hundred eleven thousand, eight hundred eighty-nine".