1368628217 has 6 divisors (see below), whose sum is σ = 1504360074. Its totient is φ = 1244207360.

The previous prime is 1368628171. The next prime is 1368628237. The reversal of 1368628217 is 7128268631.

It can be written as a sum of positive squares in only one way, i.e., 778186816 + 590441401 = 27896^2 + 24299^2 .

It is not a de Polignac number, because 1368628217 - 2²⁸ = 1100192761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1368628237) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5655368 + ... + 5655609.

It is an arithmetic number, because the mean of its divisors is an integer number (250726679).

Almost surely, 2^1368628217 is an apocalyptic number.

It is an amenable number.

1368628217 is a deficient number, since it is larger than the sum of its proper divisors (135731857).

1368628217 is a wasteful number, since it uses less digits than its factorization.

1368628217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11310999 (or 11310988 counting only the distinct ones).

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

The square root of 1368628217 is about 36994.9755642574. The cubic root of 1368628217 is about 1110.2697223500.

The spelling of 1368628217 in words is "one billion, three hundred sixty-eight million, six hundred twenty-eight thousand, two hundred seventeen".