1591085459 has 2 divisors, whose sum is σ = 1591085460. Its totient is φ = 1591085458.

The previous prime is 1591085429. The next prime is 1591085477. The reversal of 1591085459 is 9545801951.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1591085459 - 2²⁸ = 1322650003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1591085429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795542729 + 795542730.

It is an arithmetic number, because the mean of its divisors is an integer number (795542730).

Almost surely, 2^1591085459 is an apocalyptic number.

1591085459 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591085459 is an equidigital number, since it uses as much as digits as its factorization.

1591085459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 47.

The square root of 1591085459 is about 39888.4125906259. The cubic root of 1591085459 is about 1167.4308589017.

The spelling of 1591085459 in words is "one billion, five hundred ninety-one million, eighty-five thousand, four hundred fifty-nine".