1906393 has 2 divisors, whose sum is σ = 1906394. Its totient is φ = 1906392.

The previous prime is 1906391. The next prime is 1906417. The reversal of 1906393 is 3936091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1871424 + 34969 = 1368^2 + 187^2 .

It is a cyclic number.

It is not a de Polignac number, because 1906393 - 2¹ = 1906391 is a prime.

Together with 1906391, it forms a pair of twin primes.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (1906391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953196 + 953197.

It is an arithmetic number, because the mean of its divisors is an integer number (953197).

2^1906393 is an apocalyptic number.

It is an amenable number.

1906393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906393 is an equidigital number, since it uses as much as digits as its factorization.

1906393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 31.

The square root of 1906393 is about 1380.7219126240. The cubic root of 1906393 is about 123.9949919934.

The spelling of 1906393 in words is "one million, nine hundred six thousand, three hundred ninety-three".