64005769 has 4 divisors (see below), whose sum is σ = 64105344. Its totient is φ = 63906196.

The previous prime is 64005727. The next prime is 64005779. The reversal of 64005769 is 96750046.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96750046 = 2 ⋅48375023.

It is a cyclic number.

It is not a de Polignac number, because 64005769 - 2¹¹ = 64003721 is a prime.

It is a super-2 number, since 2×64005769² = 8193476930562722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64005709) 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, 48817 + ... + 50110.

It is an arithmetic number, because the mean of its divisors is an integer number (16026336).

Almost surely, 2^64005769 is an apocalyptic number.

It is an amenable number.

64005769 is a deficient number, since it is larger than the sum of its proper divisors (99575).

64005769 is an equidigital number, since it uses as much as digits as its factorization.

64005769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99574.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 64005769 is about 8000.3605543750. The cubic root of 64005769 is about 400.0120183889.

The spelling of 64005769 in words is "sixty-four million, five thousand, seven hundred sixty-nine".