85955977 has 2 divisors, whose sum is σ = 85955978. Its totient is φ = 85955976.

The previous prime is 85955953. The next prime is 85955993. The reversal of 85955977 is 77955958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85914361 + 41616 = 9269^2 + 204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85955977 is a prime.

It is not a weakly prime, because it can be changed into another prime (85955377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42977988 + 42977989.

It is an arithmetic number, because the mean of its divisors is an integer number (42977989).

Almost surely, 2^85955977 is an apocalyptic number.

It is an amenable number.

85955977 is a deficient number, since it is larger than the sum of its proper divisors (1).

85955977 is an equidigital number, since it uses as much as digits as its factorization.

85955977 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3969000, while the sum is 55.

The square root of 85955977 is about 9271.2446305768. The cubic root of 85955977 is about 441.3251664354.

The spelling of 85955977 in words is "eighty-five million, nine hundred fifty-five thousand, nine hundred seventy-seven".