1002321998 has 8 divisors (see below), whose sum is σ = 1540153440. Its totient is φ = 488937520.

The previous prime is 1002321997. The next prime is 1002322019. The reversal of 1002321998 is 8991232001.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002321997) 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, 6111638 + ... + 6111801.

It is an arithmetic number, because the mean of its divisors is an integer number (192519180).

Almost surely, 2^1002321998 is an apocalyptic number.

1002321998 is a deficient number, since it is larger than the sum of its proper divisors (537831442).

1002321998 is a wasteful number, since it uses less digits than its factorization.

1002321998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12223482.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1002321998 is about 31659.4693259379. The cubic root of 1002321998 is about 1000.7734010300.

Adding to 1002321998 its reverse (8991232001), we get a palindrome (9993553999).

The spelling of 1002321998 in words is "one billion, two million, three hundred twenty-one thousand, nine hundred ninety-eight".