1097915823 has 8 divisors (see below), whose sum is σ = 1626542000. Its totient is φ = 731943864.

The previous prime is 1097915821. The next prime is 1097915827. The reversal of 1097915823 is 3285197901.

It is not a de Polignac number, because 1097915823 - 2¹ = 1097915821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097915821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20331748 + ... + 20331801.

It is an arithmetic number, because the mean of its divisors is an integer number (203317750).

Almost surely, 2^1097915823 is an apocalyptic number.

1097915823 is a deficient number, since it is larger than the sum of its proper divisors (528626177).

1097915823 is an equidigital number, since it uses as much as digits as its factorization.

1097915823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40663558 (or 40663552 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1097915823 is about 33134.8128559677. The cubic root of 1097915823 is about 1031.6277473661.

The spelling of 1097915823 in words is "one billion, ninety-seven million, nine hundred fifteen thousand, eight hundred twenty-three".