1864648313 has 4 divisors (see below), whose sum is σ = 2034161808. Its totient is φ = 1695134820.

The previous prime is 1864648283. The next prime is 1864648321. The reversal of 1864648313 is 3138464681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1864648313 - 2²⁰ = 1863599737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1864648333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84756731 + ... + 84756752.

It is an arithmetic number, because the mean of its divisors is an integer number (508540452).

Almost surely, 2^1864648313 is an apocalyptic number.

It is an amenable number.

1864648313 is a deficient number, since it is larger than the sum of its proper divisors (169513495).

1864648313 is a wasteful number, since it uses less digits than its factorization.

1864648313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169513494.

The product of its digits is 331776, while the sum is 44.

The square root of 1864648313 is about 43181.5737670595. The cubic root of 1864648313 is about 1230.8325632135.

The spelling of 1864648313 in words is "one billion, eight hundred sixty-four million, six hundred forty-eight thousand, three hundred thirteen".