84684731 has 4 divisors (see below), whose sum is σ = 84712200. Its totient is φ = 84657264.

The previous prime is 84684707. The next prime is 84684751. The reversal of 84684731 is 13748648.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84684731 is a prime.

It is a super-2 number, since 2×84684731² = 14343007329084722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84684751) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8426 + ... + 15503.

It is an arithmetic number, because the mean of its divisors is an integer number (21178050).

Almost surely, 2^84684731 is an apocalyptic number.

84684731 is a deficient number, since it is larger than the sum of its proper divisors (27469).

84684731 is a wasteful number, since it uses less digits than its factorization.

84684731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27468.

The product of its digits is 129024, while the sum is 41.

The square root of 84684731 is about 9202.4307115023. The cubic root of 84684731 is about 439.1386921407.

The spelling of 84684731 in words is "eighty-four million, six hundred eighty-four thousand, seven hundred thirty-one".