98772777893 has 2 divisors, whose sum is σ = 98772777894. Its totient is φ = 98772777892.

The previous prime is 98772777889. The next prime is 98772777913. The reversal of 98772777893 is 39877727789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90876322849 + 7896455044 = 301457^2 + 88862^2 .

It is a cyclic number.

It is not a de Polignac number, because 98772777893 - 2² = 98772777889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 98772777893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98772777293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49386388946 + 49386388947.

It is an arithmetic number, because the mean of its divisors is an integer number (49386388947).

Almost surely, 2^98772777893 is an apocalyptic number.

It is an amenable number.

98772777893 is a deficient number, since it is larger than the sum of its proper divisors (1).

98772777893 is an equidigital number, since it uses as much as digits as its factorization.

98772777893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 522764928, while the sum is 74.

The spelling of 98772777893 in words is "ninety-eight billion, seven hundred seventy-two million, seven hundred seventy-seven thousand, eight hundred ninety-three".