85619623 has 4 divisors (see below), whose sum is σ = 85639608. Its totient is φ = 85599640.

The previous prime is 85619621. The next prime is 85619641. The reversal of 85619623 is 32691658.

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 85619623 - 2¹ = 85619621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85619621) 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, 661 + ... + 13102.

It is an arithmetic number, because the mean of its divisors is an integer number (21409902).

Almost surely, 2^85619623 is an apocalyptic number.

85619623 is a deficient number, since it is larger than the sum of its proper divisors (19985).

85619623 is a wasteful number, since it uses less digits than its factorization.

85619623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19984.

The product of its digits is 77760, while the sum is 40.

The square root of 85619623 is about 9253.0872145463. The cubic root of 85619623 is about 440.7487646765.

The spelling of 85619623 in words is "eighty-five million, six hundred nineteen thousand, six hundred twenty-three".