89491663 has 2 divisors, whose sum is σ = 89491664. Its totient is φ = 89491662.

The previous prime is 89491657. The next prime is 89491667. The reversal of 89491663 is 36619498.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89491663 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89491667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44745831 + 44745832.

It is an arithmetic number, because the mean of its divisors is an integer number (44745832).

Almost surely, 2^89491663 is an apocalyptic number.

89491663 is a deficient number, since it is larger than the sum of its proper divisors (1).

89491663 is an equidigital number, since it uses as much as digits as its factorization.

89491663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 46.

The square root of 89491663 is about 9460.0033298091. The cubic root of 89491663 is about 447.2951537920.

The spelling of 89491663 in words is "eighty-nine million, four hundred ninety-one thousand, six hundred sixty-three".