84798721 has 4 divisors (see below), whose sum is σ = 96912832. Its totient is φ = 72684612.

The previous prime is 84798689. The next prime is 84798743. The reversal of 84798721 is 12789748.

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 not a de Polignac number, because 84798721 - 2⁵ = 84798689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84798761) 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, 6057045 + ... + 6057058.

It is an arithmetic number, because the mean of its divisors is an integer number (24228208).

Almost surely, 2^84798721 is an apocalyptic number.

It is an amenable number.

84798721 is a deficient number, since it is larger than the sum of its proper divisors (12114111).

84798721 is a wasteful number, since it uses less digits than its factorization.

84798721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12114110.

The product of its digits is 225792, while the sum is 46.

The square root of 84798721 is about 9208.6221010529. The cubic root of 84798721 is about 439.3356382165.

The spelling of 84798721 in words is "eighty-four million, seven hundred ninety-eight thousand, seven hundred twenty-one".