84638705 has 16 divisors (see below), whose sum is σ = 103334400. Its totient is φ = 66543168.

The previous prime is 84638657. The next prime is 84638713. The reversal of 84638705 is 50783648.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 84638705 - 2¹⁶ = 84573169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76184 + ... + 77286.

It is an arithmetic number, because the mean of its divisors is an integer number (6458400).

Almost surely, 2^84638705 is an apocalyptic number.

It is an amenable number.

84638705 is a deficient number, since it is larger than the sum of its proper divisors (18695695).

84638705 is a wasteful number, since it uses less digits than its factorization.

84638705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 84638705 is about 9199.9296192960. The cubic root of 84638705 is about 439.0591206918.

The spelling of 84638705 in words is "eighty-four million, six hundred thirty-eight thousand, seven hundred five".