999989162797277 has 2 divisors, whose sum is σ = 999989162797278. Its totient is φ = 999989162797276.

The previous prime is 999989162797271. The next prime is 999989162797337. The reversal of 999989162797277 is 772797261989999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 900080761811716 + 99908400985561 = 30001346^2 + 9995419^2 .

It is a cyclic number.

It is not a de Polignac number, because 999989162797277 - 2¹⁸ = 999989162535133 is a prime.

It is a super-2 number, since 2×999989162797277² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999989162797271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499994581398638 + 499994581398639.

It is an arithmetic number, because the mean of its divisors is an integer number (499994581398639).

Almost surely, 2^{999989162797277} is an apocalyptic number.

It is an amenable number.

999989162797277 is a deficient number, since it is larger than the sum of its proper divisors (1).

999989162797277 is an equidigital number, since it uses as much as digits as its factorization.

999989162797277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244990049472, while the sum is 101.

The spelling of 999989162797277 in words is "nine hundred ninety-nine trillion, nine hundred eighty-nine billion, one hundred sixty-two million, seven hundred ninety-seven thousand, two hundred seventy-seven".