1670642273 has 2 divisors, whose sum is σ = 1670642274. Its totient is φ = 1670642272.

The previous prime is 1670642269. The next prime is 1670642287. The reversal of 1670642273 is 3722460761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1362569569 + 308072704 = 36913^2 + 17552^2 .

It is a cyclic number.

It is not a de Polignac number, because 1670642273 - 2² = 1670642269 is a prime.

It is not a weakly prime, because it can be changed into another prime (1670642243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835321136 + 835321137.

It is an arithmetic number, because the mean of its divisors is an integer number (835321137).

Almost surely, 2^1670642273 is an apocalyptic number.

It is an amenable number.

1670642273 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670642273 is an equidigital number, since it uses as much as digits as its factorization.

1670642273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 38.

The square root of 1670642273 is about 40873.4910791824. The cubic root of 1670642273 is about 1186.5730734146.

The spelling of 1670642273 in words is "one billion, six hundred seventy million, six hundred forty-two thousand, two hundred seventy-three".