1218593423 has 2 divisors, whose sum is σ = 1218593424. Its totient is φ = 1218593422.

The previous prime is 1218593357. The next prime is 1218593447. The reversal of 1218593423 is 3243958121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1218593423 - 2²⁰ = 1217544847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1218593323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609296711 + 609296712.

It is an arithmetic number, because the mean of its divisors is an integer number (609296712).

Almost surely, 2^1218593423 is an apocalyptic number.

1218593423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218593423 is an equidigital number, since it uses as much as digits as its factorization.

1218593423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 38.

The square root of 1218593423 is about 34908.3574950183. The cubic root of 1218593423 is about 1068.1189248703.

The spelling of 1218593423 in words is "one billion, two hundred eighteen million, five hundred ninety-three thousand, four hundred twenty-three".