85620161 has 4 divisors (see below), whose sum is σ = 93403824. Its totient is φ = 77836500.

The previous prime is 85620131. The next prime is 85620163. The reversal of 85620161 is 16102658.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85620161 - 2¹⁸ = 85358017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85620163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3891815 + ... + 3891836.

It is an arithmetic number, because the mean of its divisors is an integer number (23350956).

Almost surely, 2^85620161 is an apocalyptic number.

It is an amenable number.

85620161 is a deficient number, since it is larger than the sum of its proper divisors (7783663).

85620161 is a wasteful number, since it uses less digits than its factorization.

85620161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7783662.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 85620161 is about 9253.1162858790. The cubic root of 85620161 is about 440.7496878385.

The spelling of 85620161 in words is "eighty-five million, six hundred twenty thousand, one hundred sixty-one".