84561807 has 16 divisors (see below), whose sum is σ = 123973632. Its totient is φ = 50843520.

The previous prime is 84561797. The next prime is 84561817. The reversal of 84561807 is 70816548.

It is an interprime number because it is at equal distance from previous prime (84561797) and next prime (84561817).

It is not a de Polignac number, because 84561807 - 2⁸ = 84561551 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84561817) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5898 + ... + 14279.

It is an arithmetic number, because the mean of its divisors is an integer number (7748352).

Almost surely, 2^84561807 is an apocalyptic number.

84561807 is a deficient number, since it is larger than the sum of its proper divisors (39411825).

84561807 is a wasteful number, since it uses less digits than its factorization.

84561807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20318.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 84561807 is about 9195.7493984993. The cubic root of 84561807 is about 438.9261122043.

The spelling of 84561807 in words is "eighty-four million, five hundred sixty-one thousand, eight hundred seven".