84634881 has 4 divisors (see below), whose sum is σ = 112846512. Its totient is φ = 56423252.

The previous prime is 84634861. The next prime is 84634883. The reversal of 84634881 is 18843648.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 84634881 - 2¹¹ = 84632833 is a prime.

It is a super-2 number, since 2×84634881² = 14326126163768322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (84634883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14105811 + ... + 14105816.

It is an arithmetic number, because the mean of its divisors is an integer number (28211628).

Almost surely, 2^84634881 is an apocalyptic number.

It is an amenable number.

84634881 is a deficient number, since it is larger than the sum of its proper divisors (28211631).

84634881 is a wasteful number, since it uses less digits than its factorization.

84634881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28211630.

The product of its digits is 147456, while the sum is 42.

The square root of 84634881 is about 9199.7217892717. The cubic root of 84634881 is about 439.0525083216.

The spelling of 84634881 in words is "eighty-four million, six hundred thirty-four thousand, eight hundred eighty-one".