1099009901 has 4 divisors (see below), whose sum is σ = 1198919904. Its totient is φ = 999099900.

The previous prime is 1099009823. The next prime is 1099009921.

It is a happy number.

1099009901 is nontrivially palindromic in base 10.

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 1099009901 - 2¹⁴ = 1098993517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099009921) 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, 49954985 + ... + 49955006.

It is an arithmetic number, because the mean of its divisors is an integer number (299729976).

Almost surely, 2^1099009901 is an apocalyptic number.

1099009901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1099009901 is a deficient number, since it is larger than the sum of its proper divisors (99910003).

1099009901 is an equidigital number, since it uses as much as digits as its factorization.

1099009901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99910002.

The product of its (nonzero) digits is 6561, while the sum is 38.

The square root of 1099009901 is about 33151.3182392496. The cubic root of 1099009901 is about 1031.9703074830.

The spelling of 1099009901 in words is "one billion, ninety-nine million, nine thousand, nine hundred one".