89292821 has 2 divisors, whose sum is σ = 89292822. Its totient is φ = 89292820.

The previous prime is 89292817. The next prime is 89292839. The reversal of 89292821 is 12829298.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75933796 + 13359025 = 8714^2 + 3655^2 .

It is a cyclic number.

It is not a de Polignac number, because 89292821 - 2² = 89292817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89292871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44646410 + 44646411.

It is an arithmetic number, because the mean of its divisors is an integer number (44646411).

Almost surely, 2^89292821 is an apocalyptic number.

It is an amenable number.

89292821 is a deficient number, since it is larger than the sum of its proper divisors (1).

89292821 is an equidigital number, since it uses as much as digits as its factorization.

89292821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 89292821 is about 9449.4878697208. The cubic root of 89292821 is about 446.9636256388.

The spelling of 89292821 in words is "eighty-nine million, two hundred ninety-two thousand, eight hundred twenty-one".