1670797171 has 4 divisors (see below), whose sum is σ = 1670947344. Its totient is φ = 1670647000.

The previous prime is 1670797169. The next prime is 1670797217. The reversal of 1670797171 is 1717970761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1717970761 = 13 ⋅132151597.

It is a cyclic number.

It is not a de Polignac number, because 1670797171 - 2¹ = 1670797169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1670792171) 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, 56935 + ... + 81136.

It is an arithmetic number, because the mean of its divisors is an integer number (417736836).

Almost surely, 2^1670797171 is an apocalyptic number.

1670797171 is a deficient number, since it is larger than the sum of its proper divisors (150173).

1670797171 is a wasteful number, since it uses less digits than its factorization.

1670797171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150172.

The product of its (nonzero) digits is 129654, while the sum is 46.

The square root of 1670797171 is about 40875.3858819706. The cubic root of 1670797171 is about 1186.6097443642.

The spelling of 1670797171 in words is "one billion, six hundred seventy million, seven hundred ninety-seven thousand, one hundred seventy-one".