1977089 has 2 divisors, whose sum is σ = 1977090. Its totient is φ = 1977088.

The previous prime is 1977077. The next prime is 1977091. The reversal of 1977089 is 9807791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1399489 + 577600 = 1183^2 + 760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1977089 - 2²⁰ = 928513 is a prime.

Together with 1977091, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1917089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 988544 + 988545.

It is an arithmetic number, because the mean of its divisors is an integer number (988545).

2^1977089 is an apocalyptic number.

It is an amenable number.

1977089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1977089 is an equidigital number, since it uses as much as digits as its factorization.

1977089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31752, while the sum is 41.

The square root of 1977089 is about 1406.0899686720. The cubic root of 1977089 is about 125.5091552714.

The spelling of 1977089 in words is "one million, nine hundred seventy-seven thousand, eighty-nine".