86349869 has 2 divisors, whose sum is σ = 86349870. Its totient is φ = 86349868.

The previous prime is 86349859. The next prime is 86349871. The reversal of 86349869 is 96894368.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 879844 = 9245^2 + 938^2 .

It is a cyclic number.

It is not a de Polignac number, because 86349869 - 2⁴ = 86349853 is a prime.

It is a super-2 number, since 2×86349869² = 14912599752634322, which contains 22 as substring.

Together with 86349871, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86349869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86349839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43174934 + 43174935.

It is an arithmetic number, because the mean of its divisors is an integer number (43174935).

Almost surely, 2^86349869 is an apocalyptic number.

It is an amenable number.

86349869 is a deficient number, since it is larger than the sum of its proper divisors (1).

86349869 is an equidigital number, since it uses as much as digits as its factorization.

86349869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 53.

The square root of 86349869 is about 9292.4630211801. The cubic root of 86349869 is about 441.9982613583.

The spelling of 86349869 in words is "eighty-six million, three hundred forty-nine thousand, eight hundred sixty-nine".