1099873129 has 2 divisors, whose sum is σ = 1099873130. Its totient is φ = 1099873128.

The previous prime is 1099873081. The next prime is 1099873171. The reversal of 1099873129 is 9213789901.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 926898025 + 172975104 = 30445^2 + 13152^2 .

It is a cyclic number.

It is not a de Polignac number, because 1099873129 - 2⁷ = 1099873001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1099873529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549936564 + 549936565.

It is an arithmetic number, because the mean of its divisors is an integer number (549936565).

Almost surely, 2^1099873129 is an apocalyptic number.

It is an amenable number.

1099873129 is a deficient number, since it is larger than the sum of its proper divisors (1).

1099873129 is an equidigital number, since it uses as much as digits as its factorization.

1099873129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 1099873129 is about 33164.3351961109. The cubic root of 1099873129 is about 1032.2404271394.

The spelling of 1099873129 in words is "one billion, ninety-nine million, eight hundred seventy-three thousand, one hundred twenty-nine".