1984977 has 6 divisors (see below), whose sum is σ = 2867202. Its totient is φ = 1323312.

The previous prime is 1984921. The next prime is 1984979. The reversal of 1984977 is 7794891.

It can be written as a sum of positive squares in only one way, i.e., 1718721 + 266256 = 1311^2 + 516^2 .

It is not a de Polignac number, because 1984977 - 2⁷ = 1984849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1984979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110268 + ... + 110285.

It is an arithmetic number, because the mean of its divisors is an integer number (477867).

2^1984977 is an apocalyptic number.

It is an amenable number.

1984977 is a deficient number, since it is larger than the sum of its proper divisors (882225).

1984977 is a wasteful number, since it uses less digits than its factorization.

1984977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220559 (or 220556 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1984977 is about 1408.8921179423. The cubic root of 1984977 is about 125.6758485772.

The spelling of 1984977 in words is "one million, nine hundred eighty-four thousand, nine hundred seventy-seven".