1313189645 has 16 divisors (see below), whose sum is σ = 1588325760. Its totient is φ = 1042248384.

The previous prime is 1313189641. The next prime is 1313189663. The reversal of 1313189645 is 5469813131.

It is a cyclic number.

It is not a de Polignac number, because 1313189645 - 2² = 1313189641 is a prime.

It is a super-3 number, since 3×1313189645³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313189641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448727 + ... + 451643.

It is an arithmetic number, because the mean of its divisors is an integer number (99270360).

Almost surely, 2^1313189645 is an apocalyptic number.

It is an amenable number.

1313189645 is a deficient number, since it is larger than the sum of its proper divisors (275136115).

1313189645 is a wasteful number, since it uses less digits than its factorization.

1313189645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3604.

The product of its digits is 77760, while the sum is 41.

The square root of 1313189645 is about 36237.9586207612. The cubic root of 1313189645 is about 1095.0715173294.

The spelling of 1313189645 in words is "one billion, three hundred thirteen million, one hundred eighty-nine thousand, six hundred forty-five".