64627091 has 4 divisors (see below), whose sum is σ = 65000832. Its totient is φ = 64253352.

The previous prime is 64627063. The next prime is 64627093. The reversal of 64627091 is 19072646.

64627091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64627091 - 2⁶ = 64627027 is a prime.

It is a super-2 number, since 2×64627091² = 8353321782244562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64627093) 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, 186611 + ... + 186956.

It is an arithmetic number, because the mean of its divisors is an integer number (16250208).

Almost surely, 2^64627091 is an apocalyptic number.

64627091 is a deficient number, since it is larger than the sum of its proper divisors (373741).

64627091 is a wasteful number, since it uses less digits than its factorization.

64627091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373740.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 64627091 is about 8039.0976483683. The cubic root of 64627091 is about 401.3021956989.

The spelling of 64627091 in words is "sixty-four million, six hundred twenty-seven thousand, ninety-one".