64423777 has 4 divisors (see below), whose sum is σ = 70280496. Its totient is φ = 58567060.

The previous prime is 64423763. The next prime is 64423787. The reversal of 64423777 is 77732446.

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.

It is a cyclic number.

It is not a de Polignac number, because 64423777 - 2¹¹ = 64421729 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (64423787) 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, 2928343 + ... + 2928364.

It is an arithmetic number, because the mean of its divisors is an integer number (17570124).

Almost surely, 2^64423777 is an apocalyptic number.

It is an amenable number.

64423777 is a deficient number, since it is larger than the sum of its proper divisors (5856719).

64423777 is a wasteful number, since it uses less digits than its factorization.

64423777 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5856718.

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

The square root of 64423777 is about 8026.4423625913. The cubic root of 64423777 is about 400.8809272438.

The spelling of 64423777 in words is "sixty-four million, four hundred twenty-three thousand, seven hundred seventy-seven".