85507757 has 4 divisors (see below), whose sum is σ = 85541820. Its totient is φ = 85473696.

The previous prime is 85507753. The next prime is 85507769. The reversal of 85507757 is 75770558.

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 84529636 + 978121 = 9194^2 + 989^2 .

It is a cyclic number.

It is not a de Polignac number, because 85507757 - 2² = 85507753 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 (85507753) 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, 12938 + ... + 18395.

It is an arithmetic number, because the mean of its divisors is an integer number (21385455).

Almost surely, 2^85507757 is an apocalyptic number.

It is an amenable number.

85507757 is a deficient number, since it is larger than the sum of its proper divisors (34063).

85507757 is a wasteful number, since it uses less digits than its factorization.

85507757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34062.

The product of its (nonzero) digits is 343000, while the sum is 44.

The square root of 85507757 is about 9247.0404454615. The cubic root of 85507757 is about 440.5567281309.

The spelling of 85507757 in words is "eighty-five million, five hundred seven thousand, seven hundred fifty-seven".