86193421 has 2 divisors, whose sum is σ = 86193422. Its totient is φ = 86193420.

The previous prime is 86193407. The next prime is 86193463. The reversal of 86193421 is 12439168.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79459396 + 6734025 = 8914^2 + 2595^2 .

It is a cyclic number.

It is not a de Polignac number, because 86193421 - 2⁷ = 86193293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86193721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43096710 + 43096711.

It is an arithmetic number, because the mean of its divisors is an integer number (43096711).

Almost surely, 2^86193421 is an apocalyptic number.

It is an amenable number.

86193421 is a deficient number, since it is larger than the sum of its proper divisors (1).

86193421 is an equidigital number, since it uses as much as digits as its factorization.

86193421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 86193421 is about 9284.0411998224. The cubic root of 86193421 is about 441.7311636833.

The spelling of 86193421 in words is "eighty-six million, one hundred ninety-three thousand, four hundred twenty-one".