1816718329 has 2 divisors, whose sum is σ = 1816718330. Its totient is φ = 1816718328.

The previous prime is 1816718261. The next prime is 1816718339. The reversal of 1816718329 is 9238176181.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1493977104 + 322741225 = 38652^2 + 17965^2 .

It is a cyclic number.

It is not a de Polignac number, because 1816718329 - 2⁹ = 1816717817 is a prime.

It is not a weakly prime, because it can be changed into another prime (1816718339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908359164 + 908359165.

It is an arithmetic number, because the mean of its divisors is an integer number (908359165).

Almost surely, 2^1816718329 is an apocalyptic number.

It is an amenable number.

1816718329 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816718329 is an equidigital number, since it uses as much as digits as its factorization.

1816718329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152, while the sum is 46.

The square root of 1816718329 is about 42622.9788846345. The cubic root of 1816718329 is about 1220.1948826455.

The spelling of 1816718329 in words is "one billion, eight hundred sixteen million, seven hundred eighteen thousand, three hundred twenty-nine".