88669821 has 4 divisors (see below), whose sum is σ = 118226432. Its totient is φ = 59113212.

The previous prime is 88669817. The next prime is 88669829. The reversal of 88669821 is 12896688.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 88669821 - 2² = 88669817 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 (88669829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14778301 + ... + 14778306.

It is an arithmetic number, because the mean of its divisors is an integer number (29556608).

Almost surely, 2^88669821 is an apocalyptic number.

It is an amenable number.

88669821 is a deficient number, since it is larger than the sum of its proper divisors (29556611).

88669821 is a wasteful number, since it uses less digits than its factorization.

88669821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29556610.

The product of its digits is 331776, while the sum is 48.

The square root of 88669821 is about 9416.4654196784. The cubic root of 88669821 is about 445.9217036305.

It can be divided in two parts, 886 and 69821, that added together give a palindrome (70707).

The spelling of 88669821 in words is "eighty-eight million, six hundred sixty-nine thousand, eight hundred twenty-one".