1906993 has 8 divisors (see below), whose sum is σ = 2120256. Its totient is φ = 1700400.

The previous prime is 1906987. The next prime is 1906997. The reversal of 1906993 is 3996091.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1906993 - 2⁹ = 1906481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1906997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1053 + ... + 2218.

It is an arithmetic number, because the mean of its divisors is an integer number (265032).

2^1906993 is an apocalyptic number.

It is an amenable number.

1906993 is a deficient number, since it is larger than the sum of its proper divisors (213263).

1906993 is a wasteful number, since it uses less digits than its factorization.

1906993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3335.

The product of its (nonzero) digits is 13122, while the sum is 37.

The square root of 1906993 is about 1380.9391731716. The cubic root of 1906993 is about 124.0079989637.

The spelling of 1906993 in words is "one million, nine hundred six thousand, nine hundred ninety-three".