84523915 has 16 divisors (see below), whose sum is σ = 122738112. Its totient is φ = 54549504.

The previous prime is 84523909. The next prime is 84523927. The reversal of 84523915 is 51932548.

It is a cyclic number.

It is not a de Polignac number, because 84523915 - 2⁵ = 84523883 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, 70434 + ... + 71623.

It is an arithmetic number, because the mean of its divisors is an integer number (7671132).

Almost surely, 2^84523915 is an apocalyptic number.

84523915 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

84523915 is a deficient number, since it is larger than the sum of its proper divisors (38214197).

84523915 is a wasteful number, since it uses less digits than its factorization.

84523915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142086.

The product of its digits is 43200, while the sum is 37.

The square root of 84523915 is about 9193.6888679137. The cubic root of 84523915 is about 438.8605417311.

The spelling of 84523915 in words is "eighty-four million, five hundred twenty-three thousand, nine hundred fifteen".