65090091 has 16 divisors (see below), whose sum is σ = 94913280. Its totient is φ = 39349920.

The previous prime is 65090071. The next prime is 65090099. The reversal of 65090091 is 19009056.

65090091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 65090091 - 2⁶ = 65090027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65090099) 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 15 ways as a sum of consecutive naturals, for example, 12241 + ... + 16733.

It is an arithmetic number, because the mean of its divisors is an integer number (5932080).

Almost surely, 2^65090091 is an apocalyptic number.

65090091 is a deficient number, since it is larger than the sum of its proper divisors (29823189).

65090091 is a wasteful number, since it uses less digits than its factorization.

65090091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4946.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 65090091 is about 8067.8430202874. The cubic root of 65090091 is about 402.2582496950.

The spelling of 65090091 in words is "sixty-five million, ninety thousand, ninety-one".