88138813 has 16 divisors (see below), whose sum is σ = 102936960. Its totient is φ = 73910016.

The previous prime is 88138793. The next prime is 88138819. The reversal of 88138813 is 31883188.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88138813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88138819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 69378 + ... + 70636.

It is an arithmetic number, because the mean of its divisors is an integer number (6433560).

Almost surely, 2^88138813 is an apocalyptic number.

It is an amenable number.

88138813 is a deficient number, since it is larger than the sum of its proper divisors (14798147).

88138813 is a wasteful number, since it uses less digits than its factorization.

88138813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1476.

The product of its digits is 36864, while the sum is 40.

The square root of 88138813 is about 9388.2273619678. The cubic root of 88138813 is about 445.0297720265.

The spelling of 88138813 in words is "eighty-eight million, one hundred thirty-eight thousand, eight hundred thirteen".