90282749 has 4 divisors (see below), whose sum is σ = 90880800. Its totient is φ = 89684700.

The previous prime is 90282739. The next prime is 90282769. The reversal of 90282749 is 94728209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94728209 = 853 ⋅111053.

It is a cyclic number.

It is not a de Polignac number, because 90282749 - 2¹⁶ = 90217213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90282739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298799 + ... + 299100.

It is an arithmetic number, because the mean of its divisors is an integer number (22720200).

Almost surely, 2^90282749 is an apocalyptic number.

It is an amenable number.

90282749 is a deficient number, since it is larger than the sum of its proper divisors (598051).

90282749 is a wasteful number, since it uses less digits than its factorization.

90282749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598050.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 90282749 is about 9501.7234752438. The cubic root of 90282749 is about 448.6092850550.

The spelling of 90282749 in words is "ninety million, two hundred eighty-two thousand, seven hundred forty-nine".