85977847 has 2 divisors, whose sum is σ = 85977848. Its totient is φ = 85977846.

The previous prime is 85977811. The next prime is 85977877. The reversal of 85977847 is 74877958.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85977847 - 2⁷ = 85977719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85977877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42988923 + 42988924.

It is an arithmetic number, because the mean of its divisors is an integer number (42988924).

Almost surely, 2^85977847 is an apocalyptic number.

85977847 is a deficient number, since it is larger than the sum of its proper divisors (1).

85977847 is an equidigital number, since it uses as much as digits as its factorization.

85977847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3951360, while the sum is 55.

The square root of 85977847 is about 9272.4240088555. The cubic root of 85977847 is about 441.3625924267.

The spelling of 85977847 in words is "eighty-five million, nine hundred seventy-seven thousand, eight hundred forty-seven".