1670889 has 12 divisors (see below), whose sum is σ = 2449328. Its totient is φ = 1012440.

The previous prime is 1670887. The next prime is 1670891. The reversal of 1670889 is 9880761.

It is an interprime number because it is at equal distance from previous prime (1670887) and next prime (1670891).

It is not a de Polignac number, because 1670889 - 2¹ = 1670887 is a prime.

It is a Duffinian number.

1670889 is a lucky number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1670887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1939 + ... + 2664.

2^1670889 is an apocalyptic number.

It is an amenable number.

1670889 is a deficient number, since it is larger than the sum of its proper divisors (778439).

1670889 is a wasteful number, since it uses less digits than its factorization.

1670889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4628 (or 4617 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 1670889 is about 1292.6287169949. The cubic root of 1670889 is about 118.6631483127.

The spelling of 1670889 in words is "one million, six hundred seventy thousand, eight hundred eighty-nine".