85020977 has 2 divisors, whose sum is σ = 85020978. Its totient is φ = 85020976.

The previous prime is 85020919. The next prime is 85021033. The reversal of 85020977 is 77902058.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84805681 + 215296 = 9209^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 85020977 - 2⁶ = 85020913 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85020977.

It is not a weakly prime, because it can be changed into another prime (85020907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42510488 + 42510489.

It is an arithmetic number, because the mean of its divisors is an integer number (42510489).

Almost surely, 2^85020977 is an apocalyptic number.

It is an amenable number.

85020977 is a deficient number, since it is larger than the sum of its proper divisors (1).

85020977 is an equidigital number, since it uses as much as digits as its factorization.

85020977 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 85020977 is about 9220.6820246661. The cubic root of 85020977 is about 439.7191337687.

The spelling of 85020977 in words is "eighty-five million, twenty thousand, nine hundred seventy-seven".