64421377 has 4 divisors (see below), whose sum is σ = 64465200. Its totient is φ = 64377556.

The previous prime is 64421359. The next prime is 64421389. The reversal of 64421377 is 77312446.

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 a de Polignac number, because none of the positive numbers 2^k-64421377 is a prime.

It is a super-2 number, since 2×64421377² = 8300227629152258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64421327) 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, 19627 + ... + 22672.

It is an arithmetic number, because the mean of its divisors is an integer number (16116300).

Almost surely, 2^64421377 is an apocalyptic number.

It is an amenable number.

64421377 is a deficient number, since it is larger than the sum of its proper divisors (43823).

64421377 is a wasteful number, since it uses less digits than its factorization.

64421377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43822.

The product of its digits is 28224, while the sum is 34.

The square root of 64421377 is about 8026.2928553598. The cubic root of 64421377 is about 400.8759491326.

The spelling of 64421377 in words is "sixty-four million, four hundred twenty-one thousand, three hundred seventy-seven".