89191057 has 2 divisors, whose sum is σ = 89191058. Its totient is φ = 89191056.

The previous prime is 89191051. The next prime is 89191097. The reversal of 89191057 is 75019198.

It is a happy number.

It is an a-pointer prime, because the next prime (89191097) can be obtained adding 89191057 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76807696 + 12383361 = 8764^2 + 3519^2 .

It is a cyclic number.

It is not a de Polignac number, because 89191057 - 2³ = 89191049 is a prime.

It is not a weakly prime, because it can be changed into another prime (89191051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44595528 + 44595529.

It is an arithmetic number, because the mean of its divisors is an integer number (44595529).

Almost surely, 2^89191057 is an apocalyptic number.

It is an amenable number.

89191057 is a deficient number, since it is larger than the sum of its proper divisors (1).

89191057 is an equidigital number, since it uses as much as digits as its factorization.

89191057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 89191057 is about 9444.1017042385. The cubic root of 89191057 is about 446.7937646653.

The spelling of 89191057 in words is "eighty-nine million, one hundred ninety-one thousand, fifty-seven".