1099411661 has 4 divisors (see below), whose sum is σ = 1147212192. Its totient is φ = 1051611132.

The previous prime is 1099411619. The next prime is 1099411693. The reversal of 1099411661 is 1661149901.

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.

It is a cyclic number.

It is not a de Polignac number, because 1099411661 - 2¹⁸ = 1099149517 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 (1099411861) 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, 23900231 + ... + 23900276.

It is an arithmetic number, because the mean of its divisors is an integer number (286803048).

Almost surely, 2^1099411661 is an apocalyptic number.

It is an amenable number.

1099411661 is a deficient number, since it is larger than the sum of its proper divisors (47800531).

1099411661 is an equidigital number, since it uses as much as digits as its factorization.

1099411661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47800530.

The product of its (nonzero) digits is 11664, while the sum is 38.

The square root of 1099411661 is about 33157.3771731119. The cubic root of 1099411661 is about 1032.0960430440.

The spelling of 1099411661 in words is "one billion, ninety-nine million, four hundred eleven thousand, six hundred sixty-one".