1318084421 has 2 divisors, whose sum is σ = 1318084422. Its totient is φ = 1318084420.

The previous prime is 1318084387. The next prime is 1318084447. The reversal of 1318084421 is 1244808131.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1311453796 + 6630625 = 36214^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 1318084421 - 2⁶ = 1318084357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318084451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659042210 + 659042211.

It is an arithmetic number, because the mean of its divisors is an integer number (659042211).

Almost surely, 2^1318084421 is an apocalyptic number.

It is an amenable number.

1318084421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318084421 is an equidigital number, since it uses as much as digits as its factorization.

1318084421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 1318084421 is about 36305.4323896576. The cubic root of 1318084421 is about 1096.4304182278.

The spelling of 1318084421 in words is "one billion, three hundred eighteen million, eighty-four thousand, four hundred twenty-one".