84457289 has 8 divisors (see below), whose sum is σ = 98767680. Its totient is φ = 70708176.

The previous prime is 84457283. The next prime is 84457291. The reversal of 84457289 is 98275448.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-84457289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84457283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139994 + ... + 140595.

It is an arithmetic number, because the mean of its divisors is an integer number (12345960).

Almost surely, 2^84457289 is an apocalyptic number.

It is an amenable number.

84457289 is a deficient number, since it is larger than the sum of its proper divisors (14310391).

84457289 is a wasteful number, since it uses less digits than its factorization.

84457289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280639.

The product of its digits is 645120, while the sum is 47.

The square root of 84457289 is about 9190.0646896526. The cubic root of 84457289 is about 438.7452007711.

The spelling of 84457289 in words is "eighty-four million, four hundred fifty-seven thousand, two hundred eighty-nine".