89091617 has 2 divisors, whose sum is σ = 89091618. Its totient is φ = 89091616.

The previous prime is 89091559. The next prime is 89091637. The reversal of 89091617 is 71619098.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88811776 + 279841 = 9424^2 + 529^2 .

It is a cyclic number.

It is not a de Polignac number, because 89091617 - 2¹⁰ = 89090593 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89091637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44545808 + 44545809.

It is an arithmetic number, because the mean of its divisors is an integer number (44545809).

Almost surely, 2^89091617 is an apocalyptic number.

It is an amenable number.

89091617 is a deficient number, since it is larger than the sum of its proper divisors (1).

89091617 is an equidigital number, since it uses as much as digits as its factorization.

89091617 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 41.

The square root of 89091617 is about 9438.8355743704. The cubic root of 89091617 is about 446.6276579755.

The spelling of 89091617 in words is "eighty-nine million, ninety-one thousand, six hundred seventeen".