85430447 has 4 divisors (see below), whose sum is σ = 87739416. Its totient is φ = 83121480.

The previous prime is 85430431. The next prime is 85430461. The reversal of 85430447 is 74403458.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85430447 - 2⁴ = 85430431 is a prime.

It is a super-2 number, since 2×85430447² = 14596722549239618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85430747) 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, 1154429 + ... + 1154502.

It is an arithmetic number, because the mean of its divisors is an integer number (21934854).

Almost surely, 2^85430447 is an apocalyptic number.

85430447 is a deficient number, since it is larger than the sum of its proper divisors (2308969).

85430447 is a wasteful number, since it uses less digits than its factorization.

85430447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308968.

The product of its (nonzero) digits is 53760, while the sum is 35.

The square root of 85430447 is about 9242.8592437622. The cubic root of 85430447 is about 440.4239147983.

The spelling of 85430447 in words is "eighty-five million, four hundred thirty thousand, four hundred forty-seven".