89191049 has 2 divisors, whose sum is σ = 89191050. Its totient is φ = 89191048.

The previous prime is 89191043. The next prime is 89191051. The reversal of 89191049 is 94019198.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71910400 + 17280649 = 8480^2 + 4157^2 .

It is a cyclic number.

It is not a de Polignac number, because 89191049 - 2²⁴ = 72413833 is a prime.

Together with 89191051, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 89190997 and 89191015.

It is not a weakly prime, because it can be changed into another prime (89191043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44595524 + 44595525.

It is an arithmetic number, because the mean of its divisors is an integer number (44595525).

Almost surely, 2^89191049 is an apocalyptic number.

It is an amenable number.

89191049 is a deficient number, since it is larger than the sum of its proper divisors (1).

89191049 is an equidigital number, since it uses as much as digits as its factorization.

89191049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 89191049 is about 9444.1012806937. The cubic root of 89191049 is about 446.7937513069.

The spelling of 89191049 in words is "eighty-nine million, one hundred ninety-one thousand, forty-nine".