84309881 has 8 divisors (see below), whose sum is σ = 88194624. Its totient is φ = 80443440.

The previous prime is 84309877. The next prime is 84309887. The reversal of 84309881 is 18890348.

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 84309881 - 2² = 84309877 is a prime.

It is a super-2 number, since 2×84309881² = 14216312068468322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84309887) 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, 5330 + ... + 14036.

It is an arithmetic number, because the mean of its divisors is an integer number (11024328).

Almost surely, 2^84309881 is an apocalyptic number.

It is an amenable number.

84309881 is a deficient number, since it is larger than the sum of its proper divisors (3884743).

84309881 is a wasteful number, since it uses less digits than its factorization.

84309881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9151.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 84309881 is about 9182.0412218635. The cubic root of 84309881 is about 438.4897966627.

The spelling of 84309881 in words is "eighty-four million, three hundred nine thousand, eight hundred eighty-one".