86983409 has 2 divisors, whose sum is σ = 86983410. Its totient is φ = 86983408.

The previous prime is 86983381. The next prime is 86983433. The reversal of 86983409 is 90438968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76615009 + 10368400 = 8753^2 + 3220^2 .

It is a cyclic number.

It is not a de Polignac number, because 86983409 - 2¹² = 86979313 is a prime.

It is a super-2 number, since 2×86983409² = 15132226882522562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (86983459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43491704 + 43491705.

It is an arithmetic number, because the mean of its divisors is an integer number (43491705).

Almost surely, 2^86983409 is an apocalyptic number.

It is an amenable number.

86983409 is a deficient number, since it is larger than the sum of its proper divisors (1).

86983409 is an equidigital number, since it uses as much as digits as its factorization.

86983409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 86983409 is about 9326.4896397305. The cubic root of 86983409 is about 443.0765935162.

The spelling of 86983409 in words is "eighty-six million, nine hundred eighty-three thousand, four hundred nine".