99979803 has 24 divisors (see below), whose sum is σ = 180051456. Its totient is φ = 51937200.

The previous prime is 99979787. The next prime is 99979813. The reversal of 99979803 is 30897999.

It is a happy number.

It is not a de Polignac number, because 99979803 - 2⁴ = 99979787 is a prime.

It is a super-2 number, since 2×99979803² = 19991922015837618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99979803.

It is not an unprimeable number, because it can be changed into a prime (99979813) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71443 + ... + 72828.

It is an arithmetic number, because the mean of its divisors is an integer number (7502144).

Almost surely, 2^99979803 is an apocalyptic number.

99979803 is a deficient number, since it is larger than the sum of its proper divisors (80071653).

99979803 is a wasteful number, since it uses less digits than its factorization.

99979803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144295 (or 144292 counting only the distinct ones).

The product of its (nonzero) digits is 1102248, while the sum is 54.

The square root of 99979803 is about 9998.9900990050. The cubic root of 99979803 is about 464.1276325340.

The spelling of 99979803 in words is "ninety-nine million, nine hundred seventy-nine thousand, eight hundred three".