85280977 has 2 divisors, whose sum is σ = 85280978. Its totient is φ = 85280976.

The previous prime is 85280953. The next prime is 85281059. The reversal of 85280977 is 77908258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69288976 + 15992001 = 8324^2 + 3999^2 .

It is a cyclic number.

It is not a de Polignac number, because 85280977 - 2¹¹ = 85278929 is a prime.

It is not a weakly prime, because it can be changed into another prime (85280947) 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 as a sum of consecutive naturals, namely, 42640488 + 42640489.

It is an arithmetic number, because the mean of its divisors is an integer number (42640489).

Almost surely, 2^85280977 is an apocalyptic number.

It is an amenable number.

85280977 is a deficient number, since it is larger than the sum of its proper divisors (1).

85280977 is an equidigital number, since it uses as much as digits as its factorization.

85280977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 46.

The square root of 85280977 is about 9234.7700025501. The cubic root of 85280977 is about 440.1669080964.

The spelling of 85280977 in words is "eighty-five million, two hundred eighty thousand, nine hundred seventy-seven".