64777423 has 4 divisors (see below), whose sum is σ = 64797840. Its totient is φ = 64757008.

The previous prime is 64777411. The next prime is 64777451. The reversal of 64777423 is 32477746.

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 64777423 - 2¹³ = 64769231 is a prime.

It is a super-2 number, since 2×64777423² = 8392229061041858, 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 (64777483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4315 + ... + 12172.

It is an arithmetic number, because the mean of its divisors is an integer number (16199460).

Almost surely, 2^64777423 is an apocalyptic number.

64777423 is a deficient number, since it is larger than the sum of its proper divisors (20417).

64777423 is a wasteful number, since it uses less digits than its factorization.

64777423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20416.

The product of its digits is 197568, while the sum is 40.

The square root of 64777423 is about 8048.4422716449. The cubic root of 64777423 is about 401.6131171378.

The spelling of 64777423 in words is "sixty-four million, seven hundred seventy-seven thousand, four hundred twenty-three".