64132309 has 4 divisors (see below), whose sum is σ = 64160716. Its totient is φ = 64103904.

The previous prime is 64132297. The next prime is 64132337. The reversal of 64132309 is 90323146.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30747025 + 33385284 = 5545^2 + 5778^2 .

It is a cyclic number.

It is not a de Polignac number, because 64132309 - 2¹⁷ = 64001237 is a prime.

It is a super-2 number, since 2×64132309² = 8225906115342962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64132339) 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, 10494 + ... + 15439.

It is an arithmetic number, because the mean of its divisors is an integer number (16040179).

Almost surely, 2^64132309 is an apocalyptic number.

It is an amenable number.

64132309 is a deficient number, since it is larger than the sum of its proper divisors (28407).

64132309 is a wasteful number, since it uses less digits than its factorization.

64132309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28406.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 64132309 is about 8008.2650430664. The cubic root of 64132309 is about 400.2754540192.

The spelling of 64132309 in words is "sixty-four million, one hundred thirty-two thousand, three hundred nine".