1097447811 has 8 divisors (see below), whose sum is σ = 1463625744. Its totient is φ = 731450880.

The previous prime is 1097447803. The next prime is 1097447821. The reversal of 1097447811 is 1187447901.

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

It is not a de Polignac number, because 1097447811 - 2³ = 1097447803 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1097447821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30406 + ... + 55851.

It is an arithmetic number, because the mean of its divisors is an integer number (182953218).

Almost surely, 2^1097447811 is an apocalyptic number.

1097447811 is a deficient number, since it is larger than the sum of its proper divisors (366177933).

1097447811 is an equidigital number, since it uses as much as digits as its factorization.

1097447811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90501.

The product of its (nonzero) digits is 56448, while the sum is 42.

The square root of 1097447811 is about 33127.7498632189. The cubic root of 1097447811 is about 1031.4811414743.

It can be divided in two parts, 10974 and 47811, that added together give a palindrome (58785).

The spelling of 1097447811 in words is "one billion, ninety-seven million, four hundred forty-seven thousand, eight hundred eleven".