99278969 has 2 divisors, whose sum is σ = 99278970. Its totient is φ = 99278968.

The previous prime is 99278951. The next prime is 99279001. The reversal of 99278969 is 96987299.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82591744 + 16687225 = 9088^2 + 4085^2 .

It is a cyclic number.

It is not a de Polignac number, because 99278969 - 2²⁰ = 98230393 is a prime.

It is a super-2 number, since 2×99278969² = 19712627371405922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (99278909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49639484 + 49639485.

It is an arithmetic number, because the mean of its divisors is an integer number (49639485).

Almost surely, 2^99278969 is an apocalyptic number.

It is an amenable number.

99278969 is a deficient number, since it is larger than the sum of its proper divisors (1).

99278969 is an equidigital number, since it uses as much as digits as its factorization.

99278969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 59.

The square root of 99278969 is about 9963.8832289424. The cubic root of 99278969 is about 463.0406148723.

The spelling of 99278969 in words is "ninety-nine million, two hundred seventy-eight thousand, nine hundred sixty-nine".