85144147 has 4 divisors (see below), whose sum is σ = 92884536. Its totient is φ = 77403760.

The previous prime is 85144121. The next prime is 85144153. The reversal of 85144147 is 74144158.

It is a happy number.

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 85144147 - 2⁷ = 85144019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85144117) 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, 3870178 + ... + 3870199.

It is an arithmetic number, because the mean of its divisors is an integer number (23221134).

Almost surely, 2^85144147 is an apocalyptic number.

85144147 is a deficient number, since it is larger than the sum of its proper divisors (7740389).

85144147 is a wasteful number, since it uses less digits than its factorization.

85144147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7740388.

The product of its digits is 17920, while the sum is 34.

The square root of 85144147 is about 9227.3586144682. The cubic root of 85144147 is about 439.9313718722.

The spelling of 85144147 in words is "eighty-five million, one hundred forty-four thousand, one hundred forty-seven".