999870693377 has 2 divisors, whose sum is σ = 999870693378. Its totient is φ = 999870693376.

The previous prime is 999870693331. The next prime is 999870693383. The reversal of 999870693377 is 773396078999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 895008710401 + 104861982976 = 946049^2 + 323824^2 .

It is a cyclic number.

It is not a de Polignac number, because 999870693377 - 2¹² = 999870689281 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 999870693298 and 999870693307.

It is not a weakly prime, because it can be changed into another prime (999870693317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499935346688 + 499935346689.

It is an arithmetic number, because the mean of its divisors is an integer number (499935346689).

It is a Proth number, since it is equal to 953551 ⋅ 2²⁰ + 1 and 953551 < 2²⁰.

Almost surely, 2^999870693377 is an apocalyptic number.

It is an amenable number.

999870693377 is a deficient number, since it is larger than the sum of its proper divisors (1).

999870693377 is an equidigital number, since it uses as much as digits as its factorization.

999870693377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972182736, while the sum is 77.

The spelling of 999870693377 in words is "nine hundred ninety-nine billion, eight hundred seventy million, six hundred ninety-three thousand, three hundred seventy-seven".