988209065 has 16 divisors (see below), whose sum is σ = 1256374800. Its totient is φ = 743608320.

The previous prime is 988208993. The next prime is 988209073. The reversal of 988209065 is 560902889.

It can be written as a sum of positive squares in 8 ways, for example, as 58690921 + 929518144 = 7661^2 + 30488^2 .

It is not a de Polignac number, because 988209065 - 2²⁸ = 719773609 is a prime.

It is a super-2 number, since 2×988209065² = 1953114312296348450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214385 + ... + 218945.

It is an arithmetic number, because the mean of its divisors is an integer number (78523425).

Almost surely, 2^988209065 is an apocalyptic number.

It is an amenable number.

988209065 is a deficient number, since it is larger than the sum of its proper divisors (268165735).

988209065 is a wasteful number, since it uses less digits than its factorization.

988209065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7132.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 988209065 is about 31435.7927369424. The cubic root of 988209065 is about 996.0541389930.

The spelling of 988209065 in words is "nine hundred eighty-eight million, two hundred nine thousand, sixty-five".