64429671 has 4 divisors (see below), whose sum is σ = 85906232. Its totient is φ = 42953112.

The previous prime is 64429669. The next prime is 64429709. The reversal of 64429671 is 17692446.

It is a happy number.

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

It is not a de Polignac number, because 64429671 - 2¹ = 64429669 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 (64429661) 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, 10738276 + ... + 10738281.

It is an arithmetic number, because the mean of its divisors is an integer number (21476558).

Almost surely, 2^64429671 is an apocalyptic number.

64429671 is a deficient number, since it is larger than the sum of its proper divisors (21476561).

64429671 is a wasteful number, since it uses less digits than its factorization.

64429671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21476560.

The product of its digits is 72576, while the sum is 39.

The square root of 64429671 is about 8026.8095156170. The cubic root of 64429671 is about 400.8931521305.

The spelling of 64429671 in words is "sixty-four million, four hundred twenty-nine thousand, six hundred seventy-one".