84439957 has 8 divisors (see below), whose sum is σ = 99111296. Its totient is φ = 70420752.

The previous prime is 84439937. The next prime is 84439991. The reversal of 84439957 is 75993448.

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 84439957 - 2⁷ = 84439829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 84439957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84439937) 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, 162753 + ... + 163270.

It is an arithmetic number, because the mean of its divisors is an integer number (12388912).

Almost surely, 2^84439957 is an apocalyptic number.

It is an amenable number.

84439957 is a deficient number, since it is larger than the sum of its proper divisors (14671339).

84439957 is a wasteful number, since it uses less digits than its factorization.

84439957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326067.

The product of its digits is 1088640, while the sum is 49.

The square root of 84439957 is about 9189.1216664053. The cubic root of 84439957 is about 438.7151861837.

The spelling of 84439957 in words is "eighty-four million, four hundred thirty-nine thousand, nine hundred fifty-seven".