64406773 has 4 divisors (see below), whose sum is σ = 64503148. Its totient is φ = 64310400.

The previous prime is 64406753. The next prime is 64406803. The reversal of 64406773 is 37760446.

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 19342404 + 45064369 = 4398^2 + 6713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64406773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64406743) 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, 47178 + ... + 48523.

It is an arithmetic number, because the mean of its divisors is an integer number (16125787).

Almost surely, 2^64406773 is an apocalyptic number.

It is an amenable number.

64406773 is a deficient number, since it is larger than the sum of its proper divisors (96375).

64406773 is an equidigital number, since it uses as much as digits as its factorization.

64406773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96374.

The product of its (nonzero) digits is 84672, while the sum is 37.

The square root of 64406773 is about 8025.3830438179. The cubic root of 64406773 is about 400.8456546606.

The spelling of 64406773 in words is "sixty-four million, four hundred six thousand, seven hundred seventy-three".