1898993 has 8 divisors (see below), whose sum is σ = 2023200. Its totient is φ = 1777248.

The previous prime is 1898983. The next prime is 1899017. The reversal of 1898993 is 3998981.

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 1898993 - 2⁴ = 1898977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1898983) 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, 1130 + ... + 2252.

It is an arithmetic number, because the mean of its divisors is an integer number (252900).

2^1898993 is an apocalyptic number.

It is an amenable number.

1898993 is a deficient number, since it is larger than the sum of its proper divisors (124207).

1898993 is a wasteful number, since it uses less digits than its factorization.

1898993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1231.

The product of its digits is 139968, while the sum is 47.

The square root of 1898993 is about 1378.0395495050. The cubic root of 1898993 is about 123.8343478284.

The spelling of 1898993 in words is "one million, eight hundred ninety-eight thousand, nine hundred ninety-three".