84722399 has 4 divisors (see below), whose sum is σ = 84839664. Its totient is φ = 84605136.

The previous prime is 84722377. The next prime is 84722401. The reversal of 84722399 is 99322748.

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

It is a cyclic number.

It is not a de Polignac number, because 84722399 - 2²⁴ = 67945183 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 (84722329) 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, 57542 + ... + 58995.

It is an arithmetic number, because the mean of its divisors is an integer number (21209916).

Almost surely, 2^84722399 is an apocalyptic number.

84722399 is a deficient number, since it is larger than the sum of its proper divisors (117265).

84722399 is a wasteful number, since it uses less digits than its factorization.

84722399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117264.

The product of its digits is 217728, while the sum is 44.

The square root of 84722399 is about 9204.4771171425. The cubic root of 84722399 is about 439.2037925199.

The spelling of 84722399 in words is "eighty-four million, seven hundred twenty-two thousand, three hundred ninety-nine".