1591495259 has 2 divisors, whose sum is σ = 1591495260. Its totient is φ = 1591495258.

The previous prime is 1591495253. The next prime is 1591495291. The reversal of 1591495259 is 9525941951.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1591495259 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1591495253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 795747629 + 795747630.

It is an arithmetic number, because the mean of its divisors is an integer number (795747630).

Almost surely, 2^1591495259 is an apocalyptic number.

1591495259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1591495259 is an equidigital number, since it uses as much as digits as its factorization.

1591495259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 729000, while the sum is 50.

The square root of 1591495259 is about 39893.5490900471. The cubic root of 1591495259 is about 1167.5310781359.

The spelling of 1591495259 in words is "one billion, five hundred ninety-one million, four hundred ninety-five thousand, two hundred fifty-nine".