989002997 has 4 divisors (see below), whose sum is σ = 991758240. Its totient is φ = 986247756.

The previous prime is 989002981. The next prime is 989003021. The reversal of 989002997 is 799200989.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 799200989 = 4013 ⋅199153.

It is a cyclic number.

It is not a de Polignac number, because 989002997 - 2⁴ = 989002981 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 (989002297) 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, 1377083 + ... + 1377800.

It is an arithmetic number, because the mean of its divisors is an integer number (247939560).

Almost surely, 2^989002997 is an apocalyptic number.

It is an amenable number.

989002997 is a deficient number, since it is larger than the sum of its proper divisors (2755243).

989002997 is a wasteful number, since it uses less digits than its factorization.

989002997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2755242.

The product of its (nonzero) digits is 734832, while the sum is 53.

The square root of 989002997 is about 31448.4180365245. The cubic root of 989002997 is about 996.3208125138.

The spelling of 989002997 in words is "nine hundred eighty-nine million, two thousand, nine hundred ninety-seven".