89091749 has 2 divisors, whose sum is σ = 89091750. Its totient is φ = 89091748.

The previous prime is 89091733. The next prime is 89091767. The reversal of 89091749 is 94719098.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67404100 + 21687649 = 8210^2 + 4657^2 .

It is a cyclic number.

It is not a de Polignac number, because 89091749 - 2⁴ = 89091733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89091349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44545874 + 44545875.

It is an arithmetic number, because the mean of its divisors is an integer number (44545875).

Almost surely, 2^89091749 is an apocalyptic number.

It is an amenable number.

89091749 is a deficient number, since it is larger than the sum of its proper divisors (1).

89091749 is an equidigital number, since it uses as much as digits as its factorization.

89091749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 47.

The square root of 89091749 is about 9438.8425667557. The cubic root of 89091749 is about 446.6278785530.

The spelling of 89091749 in words is "eighty-nine million, ninety-one thousand, seven hundred forty-nine".