85720465 has 4 divisors (see below), whose sum is σ = 102864564. Its totient is φ = 68576368.

The previous prime is 85720447. The next prime is 85720493. The reversal of 85720465 is 56402758.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 38825361 + 46895104 = 6231^2 + 6848^2 .

It is a cyclic number.

It is not a de Polignac number, because 85720465 - 2⁷ = 85720337 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8572042 + ... + 8572051.

It is an arithmetic number, because the mean of its divisors is an integer number (25716141).

Almost surely, 2^85720465 is an apocalyptic number.

It is an amenable number.

85720465 is a deficient number, since it is larger than the sum of its proper divisors (17144099).

85720465 is a wasteful number, since it uses less digits than its factorization.

85720465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17144098.

The product of its (nonzero) digits is 67200, while the sum is 37.

The square root of 85720465 is about 9258.5347112813. The cubic root of 85720465 is about 440.9217333934.

The spelling of 85720465 in words is "eighty-five million, seven hundred twenty thousand, four hundred sixty-five".