99777659 has 2 divisors, whose sum is σ = 99777660. Its totient is φ = 99777658.

The previous prime is 99777653. The next prime is 99777697. The reversal of 99777659 is 95677799.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99777659 - 2²⁰ = 98729083 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 99777598 and 99777607.

It is not a weakly prime, because it can be changed into another prime (99777653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49888829 + 49888830.

It is an arithmetic number, because the mean of its divisors is an integer number (49888830).

Almost surely, 2^99777659 is an apocalyptic number.

99777659 is a deficient number, since it is larger than the sum of its proper divisors (1).

99777659 is an equidigital number, since it uses as much as digits as its factorization.

99777659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7501410, while the sum is 59.

The square root of 99777659 is about 9988.8767636807. The cubic root of 99777659 is about 463.8146229234.

The spelling of 99777659 in words is "ninety-nine million, seven hundred seventy-seven thousand, six hundred fifty-nine".