9999900077 has 2 divisors, whose sum is σ = 9999900078. Its totient is φ = 9999900076.

The previous prime is 9999900059. The next prime is 9999900101. The reversal of 9999900077 is 7700099999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7263982441 + 2735917636 = 85229^2 + 52306^2 .

It is a cyclic number.

It is not a de Polignac number, because 9999900077 - 2⁸ = 9999899821 is a prime.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 9999899989 and 9999900025.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9999900017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4999950038 + 4999950039.

It is an arithmetic number, because the mean of its divisors is an integer number (4999950039).

Almost surely, 2^9999900077 is an apocalyptic number.

It is an amenable number.

9999900077 is a deficient number, since it is larger than the sum of its proper divisors (1).

9999900077 is an equidigital number, since it uses as much as digits as its factorization.

9999900077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2893401, while the sum is 59.

The square root of 9999900077 is about 99999.5003837519. The cubic root of 9999900077 is about 2154.4275140887.

The spelling of 9999900077 in words is "nine billion, nine hundred ninety-nine million, nine hundred thousand, seventy-seven".