988666541 has 2 divisors, whose sum is σ = 988666542. Its totient is φ = 988666540.

The previous prime is 988666537. The next prime is 988666543. The reversal of 988666541 is 145666889.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 983073316 + 5593225 = 31354^2 + 2365^2 .

It is a cyclic number.

It is not a de Polignac number, because 988666541 - 2² = 988666537 is a prime.

Together with 988666543, it forms a pair of twin primes.

It is a Chen prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (988666543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494333270 + 494333271.

It is an arithmetic number, because the mean of its divisors is an integer number (494333271).

Almost surely, 2^988666541 is an apocalyptic number.

It is an amenable number.

988666541 is a deficient number, since it is larger than the sum of its proper divisors (1).

988666541 is an equidigital number, since it uses as much as digits as its factorization.

988666541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 53.

The square root of 988666541 is about 31443.0682504109. The cubic root of 988666541 is about 996.2078178660.

The spelling of 988666541 in words is "nine hundred eighty-eight million, six hundred sixty-six thousand, five hundred forty-one".