84005057 has 4 divisors (see below), whose sum is σ = 84107220. Its totient is φ = 83902896.

The previous prime is 84005029. The next prime is 84005063. The reversal of 84005057 is 75050048.

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 61952641 + 22052416 = 7871^2 + 4696^2 .

It is a cyclic number.

It is not a de Polignac number, because 84005057 - 2¹⁰ = 84004033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (84005017) 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, 49838 + ... + 51495.

It is an arithmetic number, because the mean of its divisors is an integer number (21026805).

Almost surely, 2^84005057 is an apocalyptic number.

It is an amenable number.

84005057 is a deficient number, since it is larger than the sum of its proper divisors (102163).

84005057 is a wasteful number, since it uses less digits than its factorization.

84005057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102162.

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 84005057 is about 9165.4272677273. The cubic root of 84005057 is about 437.9607023951.

The spelling of 84005057 in words is "eighty-four million, five thousand, fifty-seven".