99919012 has 6 divisors (see below), whose sum is σ = 174858278. Its totient is φ = 49959504.

The previous prime is 99918989. The next prime is 99919019. The reversal of 99919012 is 21091999.

It can be written as a sum of positive squares in only one way, i.e., 97891236 + 2027776 = 9894^2 + 1424^2 .

It is a super-2 number, since 2×99919012² = 19967617918112288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (99919019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12489873 + ... + 12489880.

Almost surely, 2^99919012 is an apocalyptic number.

It is an amenable number.

99919012 is a deficient number, since it is larger than the sum of its proper divisors (74939266).

99919012 is a wasteful number, since it uses less digits than its factorization.

99919012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24979757 (or 24979755 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 40.

The square root of 99919012 is about 9995.9497797858. The cubic root of 99919012 is about 464.0335451867.

The spelling of 99919012 in words is "ninety-nine million, nine hundred nineteen thousand, twelve".