1984397 has 2 divisors, whose sum is σ = 1984398. Its totient is φ = 1984396.

The previous prime is 1984363. The next prime is 1984399. The reversal of 1984397 is 7934891.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1485961 + 498436 = 1219^2 + 706^2 .

It is a cyclic number.

It is not a de Polignac number, because 1984397 - 2¹² = 1980301 is a prime.

Together with 1984399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1984399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 992198 + 992199.

It is an arithmetic number, because the mean of its divisors is an integer number (992199).

2^1984397 is an apocalyptic number.

It is an amenable number.

1984397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1984397 is an equidigital number, since it uses as much as digits as its factorization.

1984397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 41.

The square root of 1984397 is about 1408.6862674137. The cubic root of 1984397 is about 125.6636067740.

The spelling of 1984397 in words is "one million, nine hundred eighty-four thousand, three hundred ninety-seven".