1100472661 has 4 divisors (see below), whose sum is σ = 1119124800. Its totient is φ = 1081820524.

The previous prime is 1100472643. The next prime is 1100472701. The reversal of 1100472661 is 1662740011.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1662740011 = 409 ⋅4065379.

It is a cyclic number.

It is not a de Polignac number, because 1100472661 - 2¹⁹ = 1099948373 is a prime.

It is a super-2 number, since 2×1100472661² = 2422080155216841842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1100472161) 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, 9325981 + ... + 9326098.

It is an arithmetic number, because the mean of its divisors is an integer number (279781200).

Almost surely, 2^1100472661 is an apocalyptic number.

It is an amenable number.

1100472661 is a deficient number, since it is larger than the sum of its proper divisors (18652139).

1100472661 is an equidigital number, since it uses as much as digits as its factorization.

1100472661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18652138.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1100472661 is about 33173.3727709439. The cubic root of 1100472661 is about 1032.4279483907.

The spelling of 1100472661 in words is "one billion, one hundred million, four hundred seventy-two thousand, six hundred sixty-one".