1318427633 has 2 divisors, whose sum is σ = 1318427634. Its totient is φ = 1318427632.

The previous prime is 1318427599. The next prime is 1318427641. The reversal of 1318427633 is 3367248131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 703734784 + 614692849 = 26528^2 + 24793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318427633 - 2⁶ = 1318427569 is a prime.

It is not a weakly prime, because it can be changed into another prime (1318427683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659213816 + 659213817.

It is an arithmetic number, because the mean of its divisors is an integer number (659213817).

Almost surely, 2^1318427633 is an apocalyptic number.

It is an amenable number.

1318427633 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318427633 is an equidigital number, since it uses as much as digits as its factorization.

1318427633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 38.

The square root of 1318427633 is about 36310.1588126519. The cubic root of 1318427633 is about 1096.5255753648.

The spelling of 1318427633 in words is "one billion, three hundred eighteen million, four hundred twenty-seven thousand, six hundred thirty-three".