988929869 has 2 divisors, whose sum is σ = 988929870. Its totient is φ = 988929868.

The previous prime is 988929847. The next prime is 988929871. The reversal of 988929869 is 968929889.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 945870025 + 43059844 = 30755^2 + 6562^2 .

It is a cyclic number.

It is not a de Polignac number, because 988929869 - 2¹⁶ = 988864333 is a prime.

It is a super-2 number, since 2×988929869² = 1955964571600714322, which contains 22 as substring.

Together with 988929871, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 988929799 and 988929808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988929889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494464934 + 494464935.

It is an arithmetic number, because the mean of its divisors is an integer number (494464935).

Almost surely, 2^988929869 is an apocalyptic number.

It is an amenable number.

988929869 is a deficient number, since it is larger than the sum of its proper divisors (1).

988929869 is an equidigital number, since it uses as much as digits as its factorization.

988929869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40310784, while the sum is 68.

The square root of 988929869 is about 31447.2553492352. The cubic root of 988929869 is about 996.2962555460.

The spelling of 988929869 in words is "nine hundred eighty-eight million, nine hundred twenty-nine thousand, eight hundred sixty-nine".