99677779 has 2 divisors, whose sum is σ = 99677780. Its totient is φ = 99677778.

The previous prime is 99677759. The next prime is 99677807. The reversal of 99677779 is 97777699.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99677779 - 2¹¹ = 99675731 is a prime.

It is not a weakly prime, because it can be changed into another prime (99677759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49838889 + 49838890.

It is an arithmetic number, because the mean of its divisors is an integer number (49838890).

Almost surely, 2^99677779 is an apocalyptic number.

99677779 is a deficient number, since it is larger than the sum of its proper divisors (1).

99677779 is an equidigital number, since it uses as much as digits as its factorization.

99677779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10501974, while the sum is 61.

The square root of 99677779 is about 9983.8759507518. The cubic root of 99677779 is about 463.6598078029.

The spelling of 99677779 in words is "ninety-nine million, six hundred seventy-seven thousand, seven hundred seventy-nine".