1899313345 has 8 divisors (see below), whose sum is σ = 2282546664. Its totient is φ = 1517203584.

The previous prime is 1899313291. The next prime is 1899313349. The reversal of 1899313345 is 5433139981.

1899313345 = 30816² + 30817².

It can be written as a sum of positive squares in 4 ways, for example, as 804232881 + 1095080464 = 28359^2 + 33092^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1899313345 - 2¹⁵ = 1899280577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1899313295 and 1899313304.

It is not an unprimeable number, because it can be changed into a prime (1899313349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277164 + ... + 283933.

It is an arithmetic number, because the mean of its divisors is an integer number (285318333).

Almost surely, 2^1899313345 is an apocalyptic number.

1899313345 is the 30817-th centered square number.

It is an amenable number.

1899313345 is a deficient number, since it is larger than the sum of its proper divisors (383233319).

1899313345 is an equidigital number, since it uses as much as digits as its factorization.

1899313345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561779.

The product of its digits is 349920, while the sum is 46.

The square root of 1899313345 is about 43581.1122506069. The cubic root of 1899313345 is about 1238.4131072637.

The spelling of 1899313345 in words is "one billion, eight hundred ninety-nine million, three hundred thirteen thousand, three hundred forty-five".