64713769 has 4 divisors (see below), whose sum is σ = 65440980. Its totient is φ = 63986560.

The previous prime is 64713763. The next prime is 64713787. The reversal of 64713769 is 96731746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96731746 = 2 ⋅48365873.

It can be written as a sum of positive squares in 2 ways, for example, as 6953769 + 57760000 = 2637^2 + 7600^2 .

It is a cyclic number.

It is not a de Polignac number, because 64713769 - 2⁷ = 64713641 is a prime.

It is a super-2 number, since 2×64713769² = 8375743796370722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64713763) 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, 363472 + ... + 363649.

It is an arithmetic number, because the mean of its divisors is an integer number (16360245).

Almost surely, 2^64713769 is an apocalyptic number.

It is an amenable number.

64713769 is a deficient number, since it is larger than the sum of its proper divisors (727211).

64713769 is an equidigital number, since it uses as much as digits as its factorization.

64713769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727210.

The product of its digits is 190512, while the sum is 43.

The square root of 64713769 is about 8044.4868699004. The cubic root of 64713769 is about 401.4815246869.

The spelling of 64713769 in words is "sixty-four million, seven hundred thirteen thousand, seven hundred sixty-nine".