1330400989 has 2 divisors, whose sum is σ = 1330400990. Its totient is φ = 1330400988.

The previous prime is 1330400933. The next prime is 1330401019. The reversal of 1330400989 is 9890040331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1102904100 + 227496889 = 33210^2 + 15083^2 .

It is a cyclic number.

It is not a de Polignac number, because 1330400989 - 2²⁵ = 1296846557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1330400089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665200494 + 665200495.

It is an arithmetic number, because the mean of its divisors is an integer number (665200495).

Almost surely, 2^1330400989 is an apocalyptic number.

It is an amenable number.

1330400989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1330400989 is an equidigital number, since it uses as much as digits as its factorization.

1330400989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 1330400989 is about 36474.6622876758. The cubic root of 1330400989 is about 1099.8349584344.

The spelling of 1330400989 in words is "one billion, three hundred thirty million, four hundred thousand, nine hundred eighty-nine".