980999099 has 4 divisors (see below), whose sum is σ = 982793064. Its totient is φ = 979205136.

The previous prime is 980999057. The next prime is 980999137. The reversal of 980999099 is 990999089.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 990999089 = 47 ⋅21085087.

It is a cyclic number.

It is not a de Polignac number, because 980999099 - 2¹² = 980995003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (980999009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896162 + ... + 897255.

It is an arithmetic number, because the mean of its divisors is an integer number (245698266).

Almost surely, 2^980999099 is an apocalyptic number.

980999099 is a deficient number, since it is larger than the sum of its proper divisors (1793965).

980999099 is a wasteful number, since it uses less digits than its factorization.

980999099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1793964.

The product of its (nonzero) digits is 4251528, while the sum is 62.

The square root of 980999099 is about 31320.9051433703. The cubic root of 980999099 is about 993.6258225227.

The spelling of 980999099 in words is "nine hundred eighty million, nine hundred ninety-nine thousand, ninety-nine".