85434915 has 32 divisors (see below), whose sum is σ = 141797376. Its totient is φ = 43879680.

The previous prime is 85434913. The next prime is 85434917. The reversal of 85434915 is 51943458.

It is an interprime number because it is at equal distance from previous prime (85434913) and next prime (85434917).

It is not a de Polignac number, because 85434915 - 2¹ = 85434913 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (85434913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145252 + ... + 145838.

It is an arithmetic number, because the mean of its divisors is an integer number (4431168).

Almost surely, 2^85434915 is an apocalyptic number.

85434915 is a deficient number, since it is larger than the sum of its proper divisors (56362461).

85434915 is a wasteful number, since it uses less digits than its factorization.

85434915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939.

The product of its digits is 86400, while the sum is 39.

The square root of 85434915 is about 9243.1009407017. The cubic root of 85434915 is about 440.4315927001.

The spelling of 85434915 in words is "eighty-five million, four hundred thirty-four thousand, nine hundred fifteen".