99779827 has 6 divisors (see below), whose sum is σ = 116070468. Its totient is φ = 85525524.

The previous prime is 99779809. The next prime is 99779839. The reversal of 99779827 is 72897799.

It is not a de Polignac number, because 99779827 - 2¹¹ = 99777779 is a prime.

It is a super-2 number, since 2×99779827² = 19912027752299858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99779027) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1018113 + ... + 1018210.

It is an arithmetic number, because the mean of its divisors is an integer number (19345078).

Almost surely, 2^99779827 is an apocalyptic number.

99779827 is a deficient number, since it is larger than the sum of its proper divisors (16290641).

99779827 is a wasteful number, since it uses less digits than its factorization.

99779827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2036337 (or 2036330 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 58.

The square root of 99779827 is about 9988.9852838014. The cubic root of 99779827 is about 463.8179822019.

The spelling of 99779827 in words is "ninety-nine million, seven hundred seventy-nine thousand, eight hundred twenty-seven".