989252647 has 2 divisors, whose sum is σ = 989252648. Its totient is φ = 989252646.

The previous prime is 989252617. The next prime is 989252653. The reversal of 989252647 is 746252989.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 989252647 - 2¹⁹ = 988728359 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 989252594 and 989252603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989252617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494626323 + 494626324.

It is an arithmetic number, because the mean of its divisors is an integer number (494626324).

Almost surely, 2^989252647 is an apocalyptic number.

989252647 is a deficient number, since it is larger than the sum of its proper divisors (1).

989252647 is an equidigital number, since it uses as much as digits as its factorization.

989252647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2177280, while the sum is 52.

The square root of 989252647 is about 31452.3869841384. The cubic root of 989252647 is about 996.4046378631.

The spelling of 989252647 in words is "nine hundred eighty-nine million, two hundred fifty-two thousand, six hundred forty-seven".