84722879 has 8 divisors (see below), whose sum is σ = 86397840. Its totient is φ = 83056000.

The previous prime is 84722873. The next prime is 84722899. The reversal of 84722879 is 97822748.

It is a happy number.

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 84722879 - 2¹² = 84718783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84722873) 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, 21869 + ... + 25449.

It is an arithmetic number, because the mean of its divisors is an integer number (10799730).

Almost surely, 2^84722879 is an apocalyptic number.

84722879 is a deficient number, since it is larger than the sum of its proper divisors (1674961).

84722879 is a wasteful number, since it uses less digits than its factorization.

84722879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4041.

The product of its digits is 451584, while the sum is 47.

The square root of 84722879 is about 9204.5031913732. The cubic root of 84722879 is about 439.2046219638.

The spelling of 84722879 in words is "eighty-four million, seven hundred twenty-two thousand, eight hundred seventy-nine".