85077277 has 2 divisors, whose sum is σ = 85077278. Its totient is φ = 85077276.

The previous prime is 85077247. The next prime is 85077281. The reversal of 85077277 is 77277058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54007801 + 31069476 = 7349^2 + 5574^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85077277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85077247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42538638 + 42538639.

It is an arithmetic number, because the mean of its divisors is an integer number (42538639).

Almost surely, 2^85077277 is an apocalyptic number.

It is an amenable number.

85077277 is a deficient number, since it is larger than the sum of its proper divisors (1).

85077277 is an equidigital number, since it uses as much as digits as its factorization.

85077277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192080, while the sum is 43.

The square root of 85077277 is about 9223.7344389352. The cubic root of 85077277 is about 439.8161714868.

The spelling of 85077277 in words is "eighty-five million, seventy-seven thousand, two hundred seventy-seven".