1098423969 has 4 divisors (see below), whose sum is σ = 1464565296. Its totient is φ = 732282644.

The previous prime is 1098423959. The next prime is 1098423973. The reversal of 1098423969 is 9693248901.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1098423969 - 2⁹ = 1098423457 is a prime.

It is a super-2 number, since 2×1098423969² = 2413070431347425922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1098423959) 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, 183070659 + ... + 183070664.

It is an arithmetic number, because the mean of its divisors is an integer number (366141324).

Almost surely, 2^1098423969 is an apocalyptic number.

It is an amenable number.

1098423969 is a deficient number, since it is larger than the sum of its proper divisors (366141327).

1098423969 is an equidigital number, since it uses as much as digits as its factorization.

1098423969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366141326.

The product of its (nonzero) digits is 839808, while the sum is 51.

The square root of 1098423969 is about 33142.4798257463. The cubic root of 1098423969 is about 1031.7868781632.

The spelling of 1098423969 in words is "one billion, ninety-eight million, four hundred twenty-three thousand, nine hundred sixty-nine".