1391591059 has 2 divisors, whose sum is σ = 1391591060. Its totient is φ = 1391591058.

The previous prime is 1391591021. The next prime is 1391591099. The reversal of 1391591059 is 9501951931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1391591059 - 2⁹ = 1391590547 is a prime.

It is not a weakly prime, because it can be changed into another prime (1391591099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 695795529 + 695795530.

It is an arithmetic number, because the mean of its divisors is an integer number (695795530).

Almost surely, 2^1391591059 is an apocalyptic number.

1391591059 is a deficient number, since it is larger than the sum of its proper divisors (1).

1391591059 is an equidigital number, since it uses as much as digits as its factorization.

1391591059 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54675, while the sum is 43.

The square root of 1391591059 is about 37304.0354251387. The cubic root of 1391591059 is about 1116.4446834111. Note that the first 3 decimals are identical.

The spelling of 1391591059 in words is "one billion, three hundred ninety-one million, five hundred ninety-one thousand, fifty-nine".