1670111689 has 3 divisors (see below), whose sum is σ = 1670152557. Its totient is φ = 1670070822.

The previous prime is 1670111687. The next prime is 1670111699. The reversal of 1670111689 is 9861110761.

The square root of 1670111689 is 40867.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1670111689 - 2¹ = 1670111687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670111683) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 20434 + ... + 61300.

It is an arithmetic number, because the mean of its divisors is an integer number (556717519).

Almost surely, 2^1670111689 is an apocalyptic number.

1670111689 is the 40867-th square number.

1670111689 is the 20434-th centered octagonal number.

It is an amenable number.

1670111689 is a deficient number, since it is larger than the sum of its proper divisors (40868).

1670111689 is an frugal number, since it uses more digits than its factorization.

1670111689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81734 (or 40867 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 40.

The cubic root of 1670111689 is about 1186.4474444156.

The spelling of 1670111689 in words is "one billion, six hundred seventy million, one hundred eleven thousand, six hundred eighty-nine".