89429821 has 8 divisors (see below), whose sum is σ = 96617304. Its totient is φ = 82286400.

The previous prime is 89429803. The next prime is 89429833. The reversal of 89429821 is 12892498.

It can be written as a sum of positive squares in 4 ways, for example, as 1726596 + 87703225 = 1314^2 + 9365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 89429821 - 2⁷ = 89429693 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 (89429801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6730 + ... + 14971.

It is an arithmetic number, because the mean of its divisors is an integer number (12077163).

Almost surely, 2^89429821 is an apocalyptic number.

It is an amenable number.

89429821 is a deficient number, since it is larger than the sum of its proper divisors (7187483).

89429821 is a wasteful number, since it uses less digits than its factorization.

89429821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22031.

The product of its digits is 82944, while the sum is 43.

The square root of 89429821 is about 9456.7341614323. The cubic root of 89429821 is about 447.1920976332.

The spelling of 89429821 in words is "eighty-nine million, four hundred twenty-nine thousand, eight hundred twenty-one".