64673431 has 8 divisors (see below), whose sum is σ = 65484000. Its totient is φ = 63866400.

The previous prime is 64673407. The next prime is 64673437. The reversal of 64673431 is 13437646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64673431 - 2⁹ = 64672919 is a prime.

It is a super-2 number, since 2×64673431² = 8365305354623522, 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 (64673437) 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 7 ways as a sum of consecutive naturals, for example, 59965 + ... + 61033.

It is an arithmetic number, because the mean of its divisors is an integer number (8185500).

Almost surely, 2^64673431 is an apocalyptic number.

64673431 is a deficient number, since it is larger than the sum of its proper divisors (810569).

64673431 is a wasteful number, since it uses less digits than its factorization.

64673431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1769.

The product of its digits is 36288, while the sum is 34.

The square root of 64673431 is about 8041.9792961683. The cubic root of 64673431 is about 401.3980889251.

The spelling of 64673431 in words is "sixty-four million, six hundred seventy-three thousand, four hundred thirty-one".