86895421 has 2 divisors, whose sum is σ = 86895422. Its totient is φ = 86895420.

The previous prime is 86895407. The next prime is 86895437. The reversal of 86895421 is 12459868.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61795321 + 25100100 = 7861^2 + 5010^2 .

It is a cyclic number.

It is not a de Polignac number, because 86895421 - 2¹⁵ = 86862653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86895481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43447710 + 43447711.

It is an arithmetic number, because the mean of its divisors is an integer number (43447711).

Almost surely, 2^86895421 is an apocalyptic number.

It is an amenable number.

86895421 is a deficient number, since it is larger than the sum of its proper divisors (1).

86895421 is an equidigital number, since it uses as much as digits as its factorization.

86895421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 43.

The square root of 86895421 is about 9321.7713445461. The cubic root of 86895421 is about 442.9271451851.

The spelling of 86895421 in words is "eighty-six million, eight hundred ninety-five thousand, four hundred twenty-one".