99697279 has 16 divisors (see below), whose sum is σ = 110638080. Its totient is φ = 89084160.

The previous prime is 99697253. The next prime is 99697337. The reversal of 99697279 is 97279699.

It is not a de Polignac number, because 99697279 - 2⁷ = 99697151 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 (99697219) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237732 + ... + 238150.

It is an arithmetic number, because the mean of its divisors is an integer number (6914880).

Almost surely, 2^99697279 is an apocalyptic number.

99697279 is a deficient number, since it is larger than the sum of its proper divisors (10940801).

99697279 is a wasteful number, since it uses less digits than its factorization.

99697279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750.

The product of its digits is 3857868, while the sum is 58.

The square root of 99697279 is about 9984.8524776283. The cubic root of 99697279 is about 463.6900411435.

The spelling of 99697279 in words is "ninety-nine million, six hundred ninety-seven thousand, two hundred seventy-nine".