988643 has 2 divisors, whose sum is σ = 988644. Its totient is φ = 988642.

The previous prime is 988607. The next prime is 988649. The reversal of 988643 is 346889.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 988643 - 2⁶ = 988579 is a prime.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 988597 and 988606.

It is not a weakly prime, because it can be changed into another prime (988649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494321 + 494322.

It is an arithmetic number, because the mean of its divisors is an integer number (494322).

2⁹⁸⁸⁶⁴³ is an apocalyptic number.

988643 is a deficient number, since it is larger than the sum of its proper divisors (1).

988643 is an equidigital number, since it uses as much as digits as its factorization.

988643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 988643 is about 994.3052851112. The cubic root of 988643 is about 99.6199910948.

The spelling of 988643 in words is "nine hundred eighty-eight thousand, six hundred forty-three".