89722121 has 2 divisors, whose sum is σ = 89722122. Its totient is φ = 89722120.

The previous prime is 89722111. The next prime is 89722147. The reversal of 89722121 is 12122798.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 89510521 + 211600 = 9461^2 + 460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89722121 is a prime.

It is not a weakly prime, because it can be changed into another prime (89722111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44861060 + 44861061.

It is an arithmetic number, because the mean of its divisors is an integer number (44861061).

Almost surely, 2^89722121 is an apocalyptic number.

It is an amenable number.

89722121 is a deficient number, since it is larger than the sum of its proper divisors (1).

89722121 is an equidigital number, since it uses as much as digits as its factorization.

89722121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4032, while the sum is 32.

The square root of 89722121 is about 9472.1761491222. The cubic root of 89722121 is about 447.6787812853.

The spelling of 89722121 in words is "eighty-nine million, seven hundred twenty-two thousand, one hundred twenty-one".