1090660999 has 4 divisors (see below), whose sum is σ = 1093027320. Its totient is φ = 1088294680.

The previous prime is 1090660981. The next prime is 1090661017. The reversal of 1090660999 is 9990660901.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1090660981) and next prime (1090661017).

It is a cyclic number.

It is not a de Polignac number, because 1090660999 - 2¹³ = 1090652807 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090660939) 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, 1182469 + ... + 1183390.

It is an arithmetic number, because the mean of its divisors is an integer number (273256830).

Almost surely, 2^1090660999 is an apocalyptic number.

1090660999 is a deficient number, since it is larger than the sum of its proper divisors (2366321).

1090660999 is an equidigital number, since it uses as much as digits as its factorization.

1090660999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366320.

The product of its (nonzero) digits is 236196, while the sum is 49.

The square root of 1090660999 is about 33025.1570624577. The cubic root of 1090660999 is about 1029.3504557700.

The spelling of 1090660999 in words is "one billion, ninety million, six hundred sixty thousand, nine hundred ninety-nine".