89521309 has 4 divisors (see below), whose sum is σ = 89915904. Its totient is φ = 89126716.

The previous prime is 89521307. The next prime is 89521321. The reversal of 89521309 is 90312598.

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 89521309 - 2¹ = 89521307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (89521307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 196957 + ... + 197410.

It is an arithmetic number, because the mean of its divisors is an integer number (22478976).

Almost surely, 2^89521309 is an apocalyptic number.

It is an amenable number.

89521309 is a deficient number, since it is larger than the sum of its proper divisors (394595).

89521309 is a wasteful number, since it uses less digits than its factorization.

89521309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394594.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 89521309 is about 9461.5701128301. The cubic root of 89521309 is about 447.3445403221.

The spelling of 89521309 in words is "eighty-nine million, five hundred twenty-one thousand, three hundred nine".