64138463 has 4 divisors (see below), whose sum is σ = 64345008. Its totient is φ = 63931920.

The previous prime is 64138447. The next prime is 64138483. The reversal of 64138463 is 36483146.

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 64138463 - 2⁴ = 64138447 is a prime.

It is a super-2 number, since 2×64138463² = 8227484872004738, 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 (64138423) 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, 102806 + ... + 103427.

It is an arithmetic number, because the mean of its divisors is an integer number (16086252).

Almost surely, 2^64138463 is an apocalyptic number.

64138463 is a deficient number, since it is larger than the sum of its proper divisors (206545).

64138463 is a wasteful number, since it uses less digits than its factorization.

64138463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206544.

The product of its digits is 41472, while the sum is 35.

The square root of 64138463 is about 8008.6492618918. The cubic root of 64138463 is about 400.2882568035.

The spelling of 64138463 in words is "sixty-four million, one hundred thirty-eight thousand, four hundred sixty-three".