84371561 has 8 divisors (see below), whose sum is σ = 90040320. Its totient is φ = 78781248.

The previous prime is 84371549. The next prime is 84371653. The reversal of 84371561 is 16517348.

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

It is a cyclic number.

It is not a de Polignac number, because 84371561 - 2¹⁰ = 84370537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84374561) 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, 17381 + ... + 21698.

It is an arithmetic number, because the mean of its divisors is an integer number (11255040).

Almost surely, 2^84371561 is an apocalyptic number.

It is an amenable number.

84371561 is a deficient number, since it is larger than the sum of its proper divisors (5668759).

84371561 is a wasteful number, since it uses less digits than its factorization.

84371561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39223.

The product of its digits is 20160, while the sum is 35.

The square root of 84371561 is about 9185.3993380800. The cubic root of 84371561 is about 438.5967017194.

The spelling of 84371561 in words is "eighty-four million, three hundred seventy-one thousand, five hundred sixty-one".