88689613 has 2 divisors, whose sum is σ = 88689614. Its totient is φ = 88689612.

The previous prime is 88689589. The next prime is 88689631. The reversal of 88689613 is 31698688.

Together with next prime (88689631) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57183844 + 31505769 = 7562^2 + 5613^2 .

It is a cyclic number.

It is not a de Polignac number, because 88689613 - 2⁹ = 88689101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (88683613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44344806 + 44344807.

It is an arithmetic number, because the mean of its divisors is an integer number (44344807).

Almost surely, 2^88689613 is an apocalyptic number.

It is an amenable number.

88689613 is a deficient number, since it is larger than the sum of its proper divisors (1).

88689613 is an equidigital number, since it uses as much as digits as its factorization.

88689613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 49.

The square root of 88689613 is about 9417.5162861553. The cubic root of 88689613 is about 445.9548792389.

It can be divided in two parts, 8868 and 9613, that added together give a palindrome (18481).

The spelling of 88689613 in words is "eighty-eight million, six hundred eighty-nine thousand, six hundred thirteen".