90248661 has 20 divisors (see below), whose sum is σ = 138464172. Its totient is φ = 58537728.

The previous prime is 90248647. The next prime is 90248677. The reversal of 90248661 is 16684209.

It can be written as a sum of positive squares in 2 ways, for example, as 82464561 + 7784100 = 9081^2 + 2790^2 .

It is not a de Polignac number, because 90248661 - 2¹¹ = 90246613 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90248681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 12060 + ... + 18053.

Almost surely, 2^90248661 is an apocalyptic number.

It is an amenable number.

90248661 is a deficient number, since it is larger than the sum of its proper divisors (48215511).

90248661 is a wasteful number, since it uses less digits than its factorization.

90248661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30162 (or 30153 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 90248661 is about 9499.9295260544. The cubic root of 90248661 is about 448.5528175736.

It can be divided in two parts, 90248 and 661, that added together give a palindrome (90909).

The spelling of 90248661 in words is "ninety million, two hundred forty-eight thousand, six hundred sixty-one".