84427501 has 4 divisors (see below), whose sum is σ = 84448252. Its totient is φ = 84406752.

The previous prime is 84427459. The next prime is 84427513. The reversal of 84427501 is 10572448.

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

It can be written as a sum of positive squares in 2 ways, for example, as 81540900 + 2886601 = 9030^2 + 1699^2 .

It is a cyclic number.

It is not a de Polignac number, because 84427501 - 2⁷ = 84427373 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 (84427531) 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, 2040 + ... + 13153.

It is an arithmetic number, because the mean of its divisors is an integer number (21112063).

Almost surely, 2^84427501 is an apocalyptic number.

It is an amenable number.

84427501 is a deficient number, since it is larger than the sum of its proper divisors (20751).

84427501 is a wasteful number, since it uses less digits than its factorization.

84427501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20750.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 84427501 is about 9188.4438834876. The cubic root of 84427501 is about 438.6936130435.

Adding to 84427501 its reverse (10572448), we get a palindrome (94999949).

The spelling of 84427501 in words is "eighty-four million, four hundred twenty-seven thousand, five hundred one".