89945549 has 2 divisors, whose sum is σ = 89945550. Its totient is φ = 89945548.

The previous prime is 89945533. The next prime is 89945567. The reversal of 89945549 is 94554998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78889924 + 11055625 = 8882^2 + 3325^2 .

It is a cyclic number.

It is not a de Polignac number, because 89945549 - 2⁴ = 89945533 is a prime.

It is a super-2 number, since 2×89945549² = 16180403569822802, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 89945549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89945509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44972774 + 44972775.

It is an arithmetic number, because the mean of its divisors is an integer number (44972775).

Almost surely, 2^89945549 is an apocalyptic number.

It is an amenable number.

89945549 is a deficient number, since it is larger than the sum of its proper divisors (1).

89945549 is an equidigital number, since it uses as much as digits as its factorization.

89945549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2332800, while the sum is 53.

The square root of 89945549 is about 9483.9627266244. The cubic root of 89945549 is about 448.0500797678.

The spelling of 89945549 in words is "eighty-nine million, nine hundred forty-five thousand, five hundred forty-nine".