88840813 has 2 divisors, whose sum is σ = 88840814. Its totient is φ = 88840812.

The previous prime is 88840799. The next prime is 88840831. The reversal of 88840813 is 31804888.

Together with next prime (88840831) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81775849 + 7064964 = 9043^2 + 2658^2 .

It is a cyclic number.

It is not a de Polignac number, because 88840813 - 2¹³ = 88832621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88840853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44420406 + 44420407.

It is an arithmetic number, because the mean of its divisors is an integer number (44420407).

Almost surely, 2^88840813 is an apocalyptic number.

It is an amenable number.

88840813 is a deficient number, since it is larger than the sum of its proper divisors (1).

88840813 is an equidigital number, since it uses as much as digits as its factorization.

88840813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 40.

The square root of 88840813 is about 9425.5404619576. The cubic root of 88840813 is about 446.2081599179.

The spelling of 88840813 in words is "eighty-eight million, eight hundred forty thousand, eight hundred thirteen".