86625890 has 16 divisors (see below), whose sum is σ = 167921208. Its totient is φ = 31984896.

The previous prime is 86625881. The next prime is 86625899. The reversal of 86625890 is 9852668.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (86625881) and next prime (86625899).

It can be written as a sum of positive squares in 4 ways, for example, as 39853969 + 46771921 = 6313^2 + 6839^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (86625899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 333047 + ... + 333306.

Almost surely, 2^86625890 is an apocalyptic number.

86625890 is a deficient number, since it is larger than the sum of its proper divisors (81295318).

86625890 is a wasteful number, since it uses less digits than its factorization.

86625890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666373.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 86625890 is about 9307.3030465329. The cubic root of 86625890 is about 442.4687158025.

The spelling of 86625890 in words is "eighty-six million, six hundred twenty-five thousand, eight hundred ninety".