1868263217 has 4 divisors (see below), whose sum is σ = 1966592880. Its totient is φ = 1769933556.

The previous prime is 1868263213. The next prime is 1868263247. The reversal of 1868263217 is 7123628681.

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 1868263217 - 2² = 1868263213 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1868263211) 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, 49164803 + ... + 49164840.

It is an arithmetic number, because the mean of its divisors is an integer number (491648220).

Almost surely, 2^1868263217 is an apocalyptic number.

It is an amenable number.

1868263217 is a deficient number, since it is larger than the sum of its proper divisors (98329663).

1868263217 is an equidigital number, since it uses as much as digits as its factorization.

1868263217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98329662.

The product of its digits is 193536, while the sum is 44.

The square root of 1868263217 is about 43223.4105202262. The cubic root of 1868263217 is about 1231.6274350715.

The spelling of 1868263217 in words is "one billion, eight hundred sixty-eight million, two hundred sixty-three thousand, two hundred seventeen".