88331813 has 4 divisors (see below), whose sum is σ = 93527820. Its totient is φ = 83135808.

The previous prime is 88331809. The next prime is 88331849. The reversal of 88331813 is 31813388.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69522244 + 18809569 = 8338^2 + 4337^2 .

It is a cyclic number.

It is not a de Polignac number, because 88331813 - 2² = 88331809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (88331863) 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 3 ways as a sum of consecutive naturals, for example, 2597978 + ... + 2598011.

It is an arithmetic number, because the mean of its divisors is an integer number (23381955).

Almost surely, 2^88331813 is an apocalyptic number.

It is an amenable number.

88331813 is a deficient number, since it is larger than the sum of its proper divisors (5196007).

88331813 is a wasteful number, since it uses less digits than its factorization.

88331813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5196006.

The product of its digits is 13824, while the sum is 35.

The square root of 88331813 is about 9398.5005718998. The cubic root of 88331813 is about 445.3543665564.

The spelling of 88331813 in words is "eighty-eight million, three hundred thirty-one thousand, eight hundred thirteen".