1988865059 has 2 divisors, whose sum is σ = 1988865060. Its totient is φ = 1988865058.

The previous prime is 1988865049. The next prime is 1988865077. The reversal of 1988865059 is 9505688891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1988865059 - 2²⁸ = 1720429603 is a prime.

It is a super-2 number, since 2×1988865059² = 7911168445822146962, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1988864989 and 1988865007.

It is not a weakly prime, because it can be changed into another prime (1988865049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 994432529 + 994432530.

It is an arithmetic number, because the mean of its divisors is an integer number (994432530).

Almost surely, 2^1988865059 is an apocalyptic number.

1988865059 is a deficient number, since it is larger than the sum of its proper divisors (1).

1988865059 is an equidigital number, since it uses as much as digits as its factorization.

1988865059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6220800, while the sum is 59.

The square root of 1988865059 is about 44596.6933639704. The cubic root of 1988865059 is about 1257.5785060608.

The spelling of 1988865059 in words is "one billion, nine hundred eighty-eight million, eight hundred sixty-five thousand, fifty-nine".