1099109129 has 2 divisors, whose sum is σ = 1099109130. Its totient is φ = 1099109128.

The previous prime is 1099109117. The next prime is 1099109153. The reversal of 1099109129 is 9219019901.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1098789904 + 319225 = 33148^2 + 565^2 .

It is a cyclic number.

It is not a de Polignac number, because 1099109129 - 2⁸ = 1099108873 is a prime.

It is a super-2 number, since 2×1099109129² = 2416081754902277282, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1099109329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549554564 + 549554565.

It is an arithmetic number, because the mean of its divisors is an integer number (549554565).

Almost surely, 2^1099109129 is an apocalyptic number.

It is an amenable number.

1099109129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099109129 is an equidigital number, since it uses as much as digits as its factorization.

1099109129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13122, while the sum is 41.

The square root of 1099109129 is about 33152.8147975402. The cubic root of 1099109129 is about 1032.0013649127.

The spelling of 1099109129 in words is "one billion, ninety-nine million, one hundred nine thousand, one hundred twenty-nine".