84641489 has 2 divisors, whose sum is σ = 84641490. Its totient is φ = 84641488.

The previous prime is 84641471. The next prime is 84641497. The reversal of 84641489 is 98414648.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70140625 + 14500864 = 8375^2 + 3808^2 .

It is a cyclic number.

It is not a de Polignac number, because 84641489 - 2¹² = 84637393 is a prime.

It is not a weakly prime, because it can be changed into another prime (84631489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42320744 + 42320745.

It is an arithmetic number, because the mean of its divisors is an integer number (42320745).

Almost surely, 2^84641489 is an apocalyptic number.

It is an amenable number.

84641489 is a deficient number, since it is larger than the sum of its proper divisors (1).

84641489 is an equidigital number, since it uses as much as digits as its factorization.

84641489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 44.

The square root of 84641489 is about 9200.0809235571. The cubic root of 84641489 is about 439.0639345934.

The spelling of 84641489 in words is "eighty-four million, six hundred forty-one thousand, four hundred eighty-nine".