64691463 has 4 divisors (see below), whose sum is σ = 86255288. Its totient is φ = 43127640.

The previous prime is 64691461. The next prime is 64691467. The reversal of 64691463 is 36419646.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 64691463 - 2¹ = 64691461 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 (64691461) 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, 10781908 + ... + 10781913.

It is an arithmetic number, because the mean of its divisors is an integer number (21563822).

Almost surely, 2^64691463 is an apocalyptic number.

64691463 is a deficient number, since it is larger than the sum of its proper divisors (21563825).

64691463 is a wasteful number, since it uses less digits than its factorization.

64691463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21563824.

The product of its digits is 93312, while the sum is 39.

The square root of 64691463 is about 8043.1003350698. The cubic root of 64691463 is about 401.4353908879.

The spelling of 64691463 in words is "sixty-four million, six hundred ninety-one thousand, four hundred sixty-three".