90065749 has 2 divisors, whose sum is σ = 90065750. Its totient is φ = 90065748.

The previous prime is 90065747. The next prime is 90065753. The reversal of 90065749 is 94756009.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82264900 + 7800849 = 9070^2 + 2793^2 .

It is a cyclic number.

It is not a de Polignac number, because 90065749 - 2¹ = 90065747 is a prime.

It is a super-2 number, since 2×90065749² = 16223678285862002, which contains 22 as substring.

Together with 90065747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90065741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45032874 + 45032875.

It is an arithmetic number, because the mean of its divisors is an integer number (45032875).

Almost surely, 2^90065749 is an apocalyptic number.

It is an amenable number.

90065749 is a deficient number, since it is larger than the sum of its proper divisors (1).

90065749 is an equidigital number, since it uses as much as digits as its factorization.

90065749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 40.

The square root of 90065749 is about 9490.2976244162. The cubic root of 90065749 is about 448.2495769367.

The spelling of 90065749 in words is "ninety million, sixty-five thousand, seven hundred forty-nine".