89820161 has 2 divisors, whose sum is σ = 89820162. Its totient is φ = 89820160.

The previous prime is 89820131. The next prime is 89820169. The reversal of 89820161 is 16102898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77986561 + 11833600 = 8831^2 + 3440^2 .

It is a cyclic number.

It is not a de Polignac number, because 89820161 - 2⁶ = 89820097 is a prime.

It is a super-2 number, since 2×89820161² = 16135322644131842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (89820169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44910080 + 44910081.

It is an arithmetic number, because the mean of its divisors is an integer number (44910081).

Almost surely, 2^89820161 is an apocalyptic number.

It is an amenable number.

89820161 is a deficient number, since it is larger than the sum of its proper divisors (1).

89820161 is an equidigital number, since it uses as much as digits as its factorization.

89820161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 89820161 is about 9477.3498932982. The cubic root of 89820161 is about 447.8417825254.

The spelling of 89820161 in words is "eighty-nine million, eight hundred twenty thousand, one hundred sixty-one".