1098233999 has 2 divisors, whose sum is σ = 1098234000. Its totient is φ = 1098233998.

The previous prime is 1098233987. The next prime is 1098234001. The reversal of 1098233999 is 9993328901.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1098233999 is a prime.

It is a super-2 number, since 2×1098233999² = 2412235833119064002, which contains 22 as substring.

Together with 1098234001, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1098233999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1098233399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549116999 + 549117000.

It is an arithmetic number, because the mean of its divisors is an integer number (549117000).

Almost surely, 2^1098233999 is an apocalyptic number.

1098233999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098233999 is an equidigital number, since it uses as much as digits as its factorization.

1098233999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 1098233999 is about 33139.6137424684. The cubic root of 1098233999 is about 1031.7273929797.

The spelling of 1098233999 in words is "one billion, ninety-eight million, two hundred thirty-three thousand, nine hundred ninety-nine".