85776829 has 2 divisors, whose sum is σ = 85776830. Its totient is φ = 85776828.

The previous prime is 85776791. The next prime is 85776851. The reversal of 85776829 is 92867758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46376100 + 39400729 = 6810^2 + 6277^2 .

It is a cyclic number.

It is not a de Polignac number, because 85776829 - 2²³ = 77388221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85776869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42888414 + 42888415.

It is an arithmetic number, because the mean of its divisors is an integer number (42888415).

Almost surely, 2^85776829 is an apocalyptic number.

It is an amenable number.

85776829 is a deficient number, since it is larger than the sum of its proper divisors (1).

85776829 is an equidigital number, since it uses as much as digits as its factorization.

85776829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 52.

The square root of 85776829 is about 9261.5781052691. The cubic root of 85776829 is about 441.0183523573.

The spelling of 85776829 in words is "eighty-five million, seven hundred seventy-six thousand, eight hundred twenty-nine".