98778773 has 2 divisors, whose sum is σ = 98778774. Its totient is φ = 98778772.

The previous prime is 98778749. The next prime is 98778793. The reversal of 98778773 is 37787789.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62694724 + 36084049 = 7918^2 + 6007^2 .

It is a cyclic number.

It is not a de Polignac number, because 98778773 - 2¹⁸ = 98516629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (98778733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49389386 + 49389387.

It is an arithmetic number, because the mean of its divisors is an integer number (49389387).

Almost surely, 2^98778773 is an apocalyptic number.

It is an amenable number.

98778773 is a deficient number, since it is larger than the sum of its proper divisors (1).

98778773 is an equidigital number, since it uses as much as digits as its factorization.

98778773 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4148928, while the sum is 56.

The square root of 98778773 is about 9938.7510784806. The cubic root of 98778773 is about 462.2616612747.

The spelling of 98778773 in words is "ninety-eight million, seven hundred seventy-eight thousand, seven hundred seventy-three".