99812077 has 2 divisors, whose sum is σ = 99812078. Its totient is φ = 99812076.

The previous prime is 99812071. The next prime is 99812087. The reversal of 99812077 is 77021899.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97397161 + 2414916 = 9869^2 + 1554^2 .

It is an emirp because it is prime and its reverse (77021899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 99812077 - 2²³ = 91423469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99812071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49906038 + 49906039.

It is an arithmetic number, because the mean of its divisors is an integer number (49906039).

Almost surely, 2^99812077 is an apocalyptic number.

It is an amenable number.

99812077 is a deficient number, since it is larger than the sum of its proper divisors (1).

99812077 is an equidigital number, since it uses as much as digits as its factorization.

99812077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 99812077 is about 9990.5994314656. The cubic root of 99812077 is about 463.8679472737.

The spelling of 99812077 in words is "ninety-nine million, eight hundred twelve thousand, seventy-seven".