1218025793 has 2 divisors, whose sum is σ = 1218025794. Its totient is φ = 1218025792.

The previous prime is 1218025771. The next prime is 1218025811. The reversal of 1218025793 is 3975208121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 898081024 + 319944769 = 29968^2 + 17887^2 .

It is a cyclic number.

It is not a de Polignac number, because 1218025793 - 2⁶ = 1218025729 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1218025733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609012896 + 609012897.

It is an arithmetic number, because the mean of its divisors is an integer number (609012897).

Almost surely, 2^1218025793 is an apocalyptic number.

It is an amenable number.

1218025793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218025793 is an equidigital number, since it uses as much as digits as its factorization.

1218025793 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1218025793 is about 34900.2262600116. The cubic root of 1218025793 is about 1067.9530531646.

It can be divided in two parts, 12180 and 25793, that added together give a palindrome (37973).

The spelling of 1218025793 in words is "one billion, two hundred eighteen million, twenty-five thousand, seven hundred ninety-three".