1023899 has 4 divisors (see below), whose sum is σ = 1056960. Its totient is φ = 990840.

The previous prime is 1023871. The next prime is 1023941. The reversal of 1023899 is 9983201.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1023899 - 2⁸ = 1023643 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1023839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16484 + ... + 16545.

It is an arithmetic number, because the mean of its divisors is an integer number (264240).

2^1023899 is an apocalyptic number.

1023899 is a deficient number, since it is larger than the sum of its proper divisors (33061).

1023899 is an equidigital number, since it uses as much as digits as its factorization.

1023899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33060.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1023899 is about 1011.8789453289. The cubic root of 1023899 is about 100.7903700278.

The spelling of 1023899 in words is "one million, twenty-three thousand, eight hundred ninety-nine".