1059999991 has 2 divisors, whose sum is σ = 1059999992. Its totient is φ = 1059999990.

The previous prime is 1059999973. The next prime is 1060000037. The reversal of 1059999991 is 1999999501.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1059999991 is a prime.

It is a super-2 number, since 2×1059999991² = 2247199961840000162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1059999971) 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, 529999995 + 529999996.

It is an arithmetic number, because the mean of its divisors is an integer number (529999996).

Almost surely, 2^1059999991 is an apocalyptic number.

1059999991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1059999991 is an equidigital number, since it uses as much as digits as its factorization.

1059999991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2657205, while the sum is 61.

The square root of 1059999991 is about 32557.6410539830. The cubic root of 1059999991 is about 1019.6128195365.

The spelling of 1059999991 in words is "one billion, fifty-nine million, nine hundred ninety-nine thousand, nine hundred ninety-one".