1670197 has 4 divisors (see below), whose sum is σ = 1727820. Its totient is φ = 1612576.

The previous prime is 1670183. The next prime is 1670213. The reversal of 1670197 is 7910761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7910761 = 271 ⋅29191.

It can be written as a sum of positive squares in 2 ways, for example, as 576081 + 1094116 = 759^2 + 1046^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670197 - 2¹⁵ = 1637429 is a prime.

1670197 is a lucky number.

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1670597) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28768 + ... + 28825.

It is an arithmetic number, because the mean of its divisors is an integer number (431955).

2^1670197 is an apocalyptic number.

It is an amenable number.

1670197 is a deficient number, since it is larger than the sum of its proper divisors (57623).

1670197 is an equidigital number, since it uses as much as digits as its factorization.

1670197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57622.

The product of its (nonzero) digits is 2646, while the sum is 31.

The square root of 1670197 is about 1292.3610176727. The cubic root of 1670197 is about 118.6467645718.

The spelling of 1670197 in words is "one million, six hundred seventy thousand, one hundred ninety-seven".