101284489 has 2 divisors, whose sum is σ = 101284490. Its totient is φ = 101284488.

The previous prime is 101284457. The next prime is 101284529. The reversal of 101284489 is 984482101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94420089 + 6864400 = 9717^2 + 2620^2 .

It is an emirp because it is prime and its reverse (984482101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101284489 - 2⁵ = 101284457 is a prime.

It is a super-2 number, since 2×101284489² = 20517095423982242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101284439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50642244 + 50642245.

It is an arithmetic number, because the mean of its divisors is an integer number (50642245).

Almost surely, 2^101284489 is an apocalyptic number.

It is an amenable number.

101284489 is a deficient number, since it is larger than the sum of its proper divisors (1).

101284489 is an equidigital number, since it uses as much as digits as its factorization.

101284489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 101284489 is about 10064.0195250208. The cubic root of 101284489 is about 466.1377910418.

The spelling of 101284489 in words is "one hundred one million, two hundred eighty-four thousand, four hundred eighty-nine".