988949669 has 2 divisors, whose sum is σ = 988949670. Its totient is φ = 988949668.

The previous prime is 988949657. The next prime is 988949723. The reversal of 988949669 is 966949889.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 962550625 + 26399044 = 31025^2 + 5138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-988949669 is a prime.

It is a super-2 number, since 2×988949669² = 1956042895630419122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 988949599 and 988949608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988949609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494474834 + 494474835.

It is an arithmetic number, because the mean of its divisors is an integer number (494474835).

Almost surely, 2^988949669 is an apocalyptic number.

It is an amenable number.

988949669 is a deficient number, since it is larger than the sum of its proper divisors (1).

988949669 is an equidigital number, since it uses as much as digits as its factorization.

988949669 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60466176, while the sum is 68.

The square root of 988949669 is about 31447.5701605068. The cubic root of 988949669 is about 996.3029046640.

The spelling of 988949669 in words is "nine hundred eighty-eight million, nine hundred forty-nine thousand, six hundred sixty-nine".