1982857 has 2 divisors, whose sum is σ = 1982858. Its totient is φ = 1982856.

The previous prime is 1982843. The next prime is 1982861. The reversal of 1982857 is 7582891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1731856 + 251001 = 1316^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 1982857 - 2¹¹ = 1980809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1982837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 991428 + 991429.

It is an arithmetic number, because the mean of its divisors is an integer number (991429).

2^1982857 is an apocalyptic number.

It is an amenable number.

1982857 is a deficient number, since it is larger than the sum of its proper divisors (1).

1982857 is an equidigital number, since it uses as much as digits as its factorization.

1982857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 1982857 is about 1408.1395527433. The cubic root of 1982857 is about 125.6310910968.

The spelling of 1982857 in words is "one million, nine hundred eighty-two thousand, eight hundred fifty-seven".