1671977 has 2 divisors, whose sum is σ = 1671978. Its totient is φ = 1671976.

The previous prime is 1671961. The next prime is 1671983. The reversal of 1671977 is 7791761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1038361 + 633616 = 1019^2 + 796^2 .

It is an emirp because it is prime and its reverse (7791761) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1671977 - 2⁴ = 1671961 is a prime.

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 1671977.

It is not a weakly prime, because it can be changed into another prime (1671907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835988 + 835989.

It is an arithmetic number, because the mean of its divisors is an integer number (835989).

2^1671977 is an apocalyptic number.

It is an amenable number.

1671977 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671977 is an equidigital number, since it uses as much as digits as its factorization.

1671977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18522, while the sum is 38.

The square root of 1671977 is about 1293.0494963458. The cubic root of 1671977 is about 118.6888985756.

The spelling of 1671977 in words is "one million, six hundred seventy-one thousand, nine hundred seventy-seven".