86773889 has 2 divisors, whose sum is σ = 86773890. Its totient is φ = 86773888.

The previous prime is 86773873. The next prime is 86773901. The reversal of 86773889 is 98837768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58599025 + 28174864 = 7655^2 + 5308^2 .

It is a cyclic number.

It is not a de Polignac number, because 86773889 - 2⁴ = 86773873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (86773189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43386944 + 43386945.

It is an arithmetic number, because the mean of its divisors is an integer number (43386945).

Almost surely, 2^86773889 is an apocalyptic number.

It is an amenable number.

86773889 is a deficient number, since it is larger than the sum of its proper divisors (1).

86773889 is an equidigital number, since it uses as much as digits as its factorization.

86773889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4064256, while the sum is 56.

The square root of 86773889 is about 9315.2503455355. The cubic root of 86773889 is about 442.7205560991.

The spelling of 86773889 in words is "eighty-six million, seven hundred seventy-three thousand, eight hundred eighty-nine".