6470138639 has 4 divisors (see below), whose sum is σ = 6476307600. Its totient is φ = 6463969680.

The previous prime is 6470138603. The next prime is 6470138657. The reversal of 6470138639 is 9368310746.

It is a happy number.

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 6470138639 - 2⁸ = 6470138383 is a prime.

It is a super-3 number, since 3×6470138639³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6470138593 and 6470138602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6470138659) 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, 3082907 + ... + 3085004.

It is an arithmetic number, because the mean of its divisors is an integer number (1619076900).

Almost surely, 2^6470138639 is an apocalyptic number.

6470138639 is a deficient number, since it is larger than the sum of its proper divisors (6168961).

6470138639 is a wasteful number, since it uses less digits than its factorization.

6470138639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6168960.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 6470138639 is about 80437.1719977772. The cubic root of 6470138639 is about 1863.3932968380.

The spelling of 6470138639 in words is "six billion, four hundred seventy million, one hundred thirty-eight thousand, six hundred thirty-nine".