989477 has 2 divisors, whose sum is σ = 989478. Its totient is φ = 989476.

The previous prime is 989467. The next prime is 989479. The reversal of 989477 is 774989.

989477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 982081 + 7396 = 991^2 + 86^2 .

It is a cyclic number.

It is not a de Polignac number, because 989477 - 2¹⁰ = 988453 is a prime.

Together with 989479, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 989477.

It is not a weakly prime, because it can be changed into another prime (989479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494738 + 494739.

It is an arithmetic number, because the mean of its divisors is an integer number (494739).

2⁹⁸⁹⁴⁷⁷ is an apocalyptic number.

It is an amenable number.

989477 is a deficient number, since it is larger than the sum of its proper divisors (1).

989477 is an equidigital number, since it uses as much as digits as its factorization.

989477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 44.

The square root of 989477 is about 994.7245849983. The cubic root of 989477 is about 99.6479957170.

The spelling of 989477 in words is "nine hundred eighty-nine thousand, four hundred seventy-seven".