85021723 has 4 divisors (see below), whose sum is σ = 85045968. Its totient is φ = 84997480.

The previous prime is 85021697. The next prime is 85021753. The reversal of 85021723 is 32712058.

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 85021723 - 2⁵ = 85021691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85021691 and 85021700.

It is not an unprimeable number, because it can be changed into a prime (85021753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5743 + ... + 14248.

It is an arithmetic number, because the mean of its divisors is an integer number (21261492).

Almost surely, 2^85021723 is an apocalyptic number.

85021723 is a deficient number, since it is larger than the sum of its proper divisors (24245).

85021723 is a wasteful number, since it uses less digits than its factorization.

85021723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24244.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 85021723 is about 9220.7224771164. The cubic root of 85021723 is about 439.7204198415.

The spelling of 85021723 in words is "eighty-five million, twenty-one thousand, seven hundred twenty-three".