1097011661 has 8 divisors (see below), whose sum is σ = 1116287040. Its totient is φ = 1077851232.

The previous prime is 1097011651. The next prime is 1097011691. The reversal of 1097011661 is 1661107901.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1097011661 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1097011651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9371 + ... + 47768.

It is an arithmetic number, because the mean of its divisors is an integer number (139535880).

Almost surely, 2^1097011661 is an apocalyptic number.

It is an amenable number.

1097011661 is a deficient number, since it is larger than the sum of its proper divisors (19275379).

1097011661 is an equidigital number, since it uses as much as digits as its factorization.

1097011661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57475.

The product of its (nonzero) digits is 2268, while the sum is 32.

The square root of 1097011661 is about 33121.1663592936. The cubic root of 1097011661 is about 1031.3444789056.

The spelling of 1097011661 in words is "one billion, ninety-seven million, eleven thousand, six hundred sixty-one".