988862309 has 2 divisors, whose sum is σ = 988862310. Its totient is φ = 988862308.

The previous prime is 988862297. The next prime is 988862311. The reversal of 988862309 is 903268889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 894189409 + 94672900 = 29903^2 + 9730^2 .

It is a cyclic number.

It is not a de Polignac number, because 988862309 - 2⁴ = 988862293 is a prime.

It is a super-2 number, since 2×988862309² = 1955697332321622962, which contains 22 as substring.

Together with 988862311, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988862339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494431154 + 494431155.

It is an arithmetic number, because the mean of its divisors is an integer number (494431155).

Almost surely, 2^988862309 is an apocalyptic number.

It is an amenable number.

988862309 is a deficient number, since it is larger than the sum of its proper divisors (1).

988862309 is an equidigital number, since it uses as much as digits as its factorization.

988862309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 988862309 is about 31446.1811512940. The cubic root of 988862309 is about 996.2735672813.

The spelling of 988862309 in words is "nine hundred eighty-eight million, eight hundred sixty-two thousand, three hundred nine".