88921109 has 4 divisors (see below), whose sum is σ = 89205516. Its totient is φ = 88636704.

The previous prime is 88921073. The next prime is 88921111. The reversal of 88921109 is 90112988.

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 47679025 + 41242084 = 6905^2 + 6422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-88921109 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 (88921139) 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, 141734 + ... + 142359.

It is an arithmetic number, because the mean of its divisors is an integer number (22301379).

Almost surely, 2^88921109 is an apocalyptic number.

It is an amenable number.

88921109 is a deficient number, since it is larger than the sum of its proper divisors (284407).

88921109 is a wasteful number, since it uses less digits than its factorization.

88921109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284406.

The product of its (nonzero) digits is 10368, while the sum is 38.

The square root of 88921109 is about 9429.7989904345. The cubic root of 88921109 is about 446.3425498842.

It can be divided in two parts, 8892 and 1109, that added together give a palindrome (10001).

The spelling of 88921109 in words is "eighty-eight million, nine hundred twenty-one thousand, one hundred nine".