1099712129 has 2 divisors, whose sum is σ = 1099712130. Its totient is φ = 1099712128.

The previous prime is 1099712101. The next prime is 1099712147. The reversal of 1099712129 is 9212179901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1071907600 + 27804529 = 32740^2 + 5273^2 .

It is an emirp because it is prime and its reverse (9212179901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1099712129 - 2¹² = 1099708033 is a prime.

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 (1099712149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549856064 + 549856065.

It is an arithmetic number, because the mean of its divisors is an integer number (549856065).

Almost surely, 2^1099712129 is an apocalyptic number.

It is an amenable number.

1099712129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099712129 is an equidigital number, since it uses as much as digits as its factorization.

1099712129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 41.

The square root of 1099712129 is about 33161.9078009695. The cubic root of 1099712129 is about 1032.1900580517.

The spelling of 1099712129 in words is "one billion, ninety-nine million, seven hundred twelve thousand, one hundred twenty-nine".