89722261 has 2 divisors, whose sum is σ = 89722262. Its totient is φ = 89722260.

The previous prime is 89722247. The next prime is 89722267. The reversal of 89722261 is 16222798.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81108036 + 8614225 = 9006^2 + 2935^2 .

It is a cyclic number.

It is not a de Polignac number, because 89722261 - 2⁵ = 89722229 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 89722261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89722267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44861130 + 44861131.

It is an arithmetic number, because the mean of its divisors is an integer number (44861131).

Almost surely, 2^89722261 is an apocalyptic number.

It is an amenable number.

89722261 is a deficient number, since it is larger than the sum of its proper divisors (1).

89722261 is an equidigital number, since it uses as much as digits as its factorization.

89722261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 89722261 is about 9472.1835391846. The cubic root of 89722261 is about 447.6790141339.

The spelling of 89722261 in words is "eighty-nine million, seven hundred twenty-two thousand, two hundred sixty-one".