90748609 has 4 divisors (see below), whose sum is σ = 103712704. Its totient is φ = 77784516.

The previous prime is 90748591. The next prime is 90748613. The reversal of 90748609 is 90684709.

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.

It is a cyclic number.

It is not a de Polignac number, because 90748609 - 2¹³ = 90740417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90748649) 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 3 ways as a sum of consecutive naturals, for example, 6482037 + ... + 6482050.

It is an arithmetic number, because the mean of its divisors is an integer number (25928176).

Almost surely, 2^90748609 is an apocalyptic number.

It is an amenable number.

90748609 is a deficient number, since it is larger than the sum of its proper divisors (12964095).

90748609 is a wasteful number, since it uses less digits than its factorization.

90748609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12964094.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 90748609 is about 9526.2064327832. The cubic root of 90748609 is about 449.3795713267.

The spelling of 90748609 in words is "ninety million, seven hundred forty-eight thousand, six hundred nine".