1099041691 has 4 divisors (see below), whose sum is σ = 1198954584. Its totient is φ = 999128800.

The previous prime is 1099041689. The next prime is 1099041709. The reversal of 1099041691 is 1961409901.

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

It is a cyclic number.

It is not a de Polignac number, because 1099041691 - 2¹ = 1099041689 is a prime.

It is a super-2 number, since 2×1099041691² = 2415785277112278962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1099041631) 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, 49956430 + ... + 49956451.

It is an arithmetic number, because the mean of its divisors is an integer number (299738646).

Almost surely, 2^1099041691 is an apocalyptic number.

1099041691 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1099041691 is a deficient number, since it is larger than the sum of its proper divisors (99912893).

1099041691 is an equidigital number, since it uses as much as digits as its factorization.

1099041691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99912892.

The product of its (nonzero) digits is 17496, while the sum is 40.

The square root of 1099041691 is about 33151.7977038953. The cubic root of 1099041691 is about 1031.9802576572.

The spelling of 1099041691 in words is "one billion, ninety-nine million, forty-one thousand, six hundred ninety-one".