99778293 has 6 divisors (see below), whose sum is σ = 144124214. Its totient is φ = 66518856.

The previous prime is 99778271. The next prime is 99778309. The reversal of 99778293 is 39287799.

It can be written as a sum of positive squares in only one way, i.e., 59861169 + 39917124 = 7737^2 + 6318^2 .

It is not a de Polignac number, because 99778293 - 2⁸ = 99778037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99778223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5543230 + ... + 5543247.

Almost surely, 2^99778293 is an apocalyptic number.

It is an amenable number.

99778293 is a deficient number, since it is larger than the sum of its proper divisors (44345921).

99778293 is a wasteful number, since it uses less digits than its factorization.

99778293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11086483 (or 11086480 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 99778293 is about 9988.9084989302. The cubic root of 99778293 is about 463.8156053005.

The spelling of 99778293 in words is "ninety-nine million, seven hundred seventy-eight thousand, two hundred ninety-three".