85572077 has 2 divisors, whose sum is σ = 85572078. Its totient is φ = 85572076.

The previous prime is 85572049. The next prime is 85572079. The reversal of 85572077 is 77027558.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84529636 + 1042441 = 9194^2 + 1021^2 .

It is a cyclic number.

It is not a de Polignac number, because 85572077 - 2⁸ = 85571821 is a prime.

Together with 85572079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85572079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42786038 + 42786039.

It is an arithmetic number, because the mean of its divisors is an integer number (42786039).

Almost surely, 2^85572077 is an apocalyptic number.

It is an amenable number.

85572077 is a deficient number, since it is larger than the sum of its proper divisors (1).

85572077 is an equidigital number, since it uses as much as digits as its factorization.

85572077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 137200, while the sum is 41.

The square root of 85572077 is about 9250.5176611906. The cubic root of 85572077 is about 440.6671645313.

The spelling of 85572077 in words is "eighty-five million, five hundred seventy-two thousand, seventy-seven".