1239315089 has 2 divisors, whose sum is σ = 1239315090. Its totient is φ = 1239315088.

The previous prime is 1239315047. The next prime is 1239315097. The reversal of 1239315089 is 9805139321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1142980864 + 96334225 = 33808^2 + 9815^2 .

It is a cyclic number.

It is not a de Polignac number, because 1239315089 - 2¹⁶ = 1239249553 is a prime.

It is not a weakly prime, because it can be changed into another prime (1239315689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 619657544 + 619657545.

It is an arithmetic number, because the mean of its divisors is an integer number (619657545).

Almost surely, 2^1239315089 is an apocalyptic number.

It is an amenable number.

1239315089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1239315089 is an equidigital number, since it uses as much as digits as its factorization.

1239315089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 1239315089 is about 35203.9072973441. The cubic root of 1239315089 is about 1074.1392320652.

The spelling of 1239315089 in words is "one billion, two hundred thirty-nine million, three hundred fifteen thousand, eighty-nine".