1098065923 has 4 divisors (see below), whose sum is σ = 1099248840. Its totient is φ = 1096883008.

The previous prime is 1098065797. The next prime is 1098065939. The reversal of 1098065923 is 3295608901.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3295608901 = 13 ⋅253508377.

It is a cyclic number.

It is not a de Polignac number, because 1098065923 - 2²¹ = 1095968771 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1098065923.

It is not an unprimeable number, because it can be changed into a prime (1098065323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590065 + ... + 591922.

It is an arithmetic number, because the mean of its divisors is an integer number (274812210).

Almost surely, 2^1098065923 is an apocalyptic number.

1098065923 is a deficient number, since it is larger than the sum of its proper divisors (1182917).

1098065923 is an equidigital number, since it uses as much as digits as its factorization.

1098065923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182916.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 1098065923 is about 33137.0777679626. The cubic root of 1098065923 is about 1031.6747577306.

The spelling of 1098065923 in words is "one billion, ninety-eight million, sixty-five thousand, nine hundred twenty-three".