1671213197 has 2 divisors, whose sum is σ = 1671213198. Its totient is φ = 1671213196.

The previous prime is 1671213149. The next prime is 1671213199. The reversal of 1671213197 is 7913121761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1308920041 + 362293156 = 36179^2 + 19034^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671213197 - 2⁶ = 1671213133 is a prime.

Together with 1671213199, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1671213197.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1671213199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835606598 + 835606599.

It is an arithmetic number, because the mean of its divisors is an integer number (835606599).

Almost surely, 2^1671213197 is an apocalyptic number.

It is an amenable number.

1671213197 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671213197 is an equidigital number, since it uses as much as digits as its factorization.

1671213197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15876, while the sum is 38.

The square root of 1671213197 is about 40880.4745202401. The cubic root of 1671213197 is about 1186.7082242088.

The spelling of 1671213197 in words is "one billion, six hundred seventy-one million, two hundred thirteen thousand, one hundred ninety-seven".