1993601 has 2 divisors, whose sum is σ = 1993602. Its totient is φ = 1993600.

The previous prime is 1993591. The next prime is 1993603. The reversal of 1993601 is 1063991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 303601 = 1300^2 + 551^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1993601 is a prime.

Together with 1993603, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1993603) 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 as a sum of consecutive naturals, namely, 996800 + 996801.

It is an arithmetic number, because the mean of its divisors is an integer number (996801).

2^1993601 is an apocalyptic number.

It is an amenable number.

1993601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993601 is an equidigital number, since it uses as much as digits as its factorization.

1993601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 1993601 is about 1411.9493616982. The cubic root of 1993601 is about 125.8575908480.

The spelling of 1993601 in words is "one million, nine hundred ninety-three thousand, six hundred one".