99999127379377 has 2 divisors, whose sum is σ = 99999127379378. Its totient is φ = 99999127379376.

The previous prime is 99999127379323. The next prime is 99999127379399. The reversal of 99999127379377 is 77397372199999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96265610742016 + 3733516637361 = 9811504^2 + 1932231^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999127379377 - 2²⁷ = 99998993161649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 99999127379291 and 99999127379300.

It is not a weakly prime, because it can be changed into another prime (99999127329377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999563689688 + 49999563689689.

It is an arithmetic number, because the mean of its divisors is an integer number (49999563689689).

Almost surely, 2^{99999127379377} is an apocalyptic number.

It is an amenable number.

99999127379377 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999127379377 is an equidigital number, since it uses as much as digits as its factorization.

99999127379377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22967817138, while the sum is 91.

The spelling of 99999127379377 in words is "ninety-nine trillion, nine hundred ninety-nine billion, one hundred twenty-seven million, three hundred seventy-nine thousand, three hundred seventy-seven".