1802116109 has 2 divisors, whose sum is σ = 1802116110. Its totient is φ = 1802116108.

The previous prime is 1802116051. The next prime is 1802116139. The reversal of 1802116109 is 9016112081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1028998084 + 773118025 = 32078^2 + 27805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1802116109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1802116139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 901058054 + 901058055.

It is an arithmetic number, because the mean of its divisors is an integer number (901058055).

Almost surely, 2^1802116109 is an apocalyptic number.

It is an amenable number.

1802116109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1802116109 is an equidigital number, since it uses as much as digits as its factorization.

1802116109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 29.

The square root of 1802116109 is about 42451.3381296750. The cubic root of 1802116109 is about 1216.9169014126.

The spelling of 1802116109 in words is "one billion, eight hundred two million, one hundred sixteen thousand, one hundred nine".