88729813 has 4 divisors (see below), whose sum is σ = 89608428. Its totient is φ = 87851200.

The previous prime is 88729793. The next prime is 88729819. The reversal of 88729813 is 31892788.

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 79530724 + 9199089 = 8918^2 + 3033^2 .

It is a cyclic number.

It is not a de Polignac number, because 88729813 - 2⁹ = 88729301 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 (88729819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439156 + ... + 439357.

It is an arithmetic number, because the mean of its divisors is an integer number (22402107).

Almost surely, 2^88729813 is an apocalyptic number.

It is an amenable number.

88729813 is a deficient number, since it is larger than the sum of its proper divisors (878615).

88729813 is a wasteful number, since it uses less digits than its factorization.

88729813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878614.

The product of its digits is 193536, while the sum is 46.

The square root of 88729813 is about 9419.6503650613. The cubic root of 88729813 is about 446.0222478127.

The spelling of 88729813 in words is "eighty-eight million, seven hundred twenty-nine thousand, eight hundred thirteen".