1018309345 has 4 divisors (see below), whose sum is σ = 1221971220. Its totient is φ = 814647472.

The previous prime is 1018309309. The next prime is 1018309363. The reversal of 1018309345 is 5439038101.

1018309345 is digitally balanced in base 2 and base 6, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 336942736 + 681366609 = 18356^2 + 26103^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1018309345 is a prime.

It is a super-2 number, since 2×1018309345² = 2073907844228658050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1018309345.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101830930 + ... + 101830939.

It is an arithmetic number, because the mean of its divisors is an integer number (305492805).

Almost surely, 2^1018309345 is an apocalyptic number.

It is an amenable number.

1018309345 is a deficient number, since it is larger than the sum of its proper divisors (203661875).

1018309345 is an equidigital number, since it uses as much as digits as its factorization.

1018309345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203661874.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 1018309345 is about 31910.9596377169. The cubic root of 1018309345 is about 1006.0662413053.

The spelling of 1018309345 in words is "one billion, eighteen million, three hundred nine thousand, three hundred forty-five".