88436809 has 2 divisors, whose sum is σ = 88436810. Its totient is φ = 88436808.

The previous prime is 88436801. The next prime is 88436813. The reversal of 88436809 is 90863488.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84548025 + 3888784 = 9195^2 + 1972^2 .

It is a cyclic number.

It is not a de Polignac number, because 88436809 - 2³ = 88436801 is a prime.

It is a super-2 number, since 2×88436809² = 15642138372204962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (88436801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44218404 + 44218405.

It is an arithmetic number, because the mean of its divisors is an integer number (44218405).

Almost surely, 2^88436809 is an apocalyptic number.

It is an amenable number.

88436809 is a deficient number, since it is larger than the sum of its proper divisors (1).

88436809 is an equidigital number, since it uses as much as digits as its factorization.

88436809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 88436809 is about 9404.0846976194. The cubic root of 88436809 is about 445.5307541657.

The spelling of 88436809 in words is "eighty-eight million, four hundred thirty-six thousand, eight hundred nine".