6394503421 has 8 divisors (see below), whose sum is σ = 6457290840. Its totient is φ = 6331791168.

The previous prime is 6394503419. The next prime is 6394503431. The reversal of 6394503421 is 1243054936.

It can be written as a sum of positive squares in 4 ways, for example, as 40819321 + 6353684100 = 6389^2 + 79710^2 .

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 6394503421 - 2¹ = 6394503419 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 (6394503431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160515 + ... + 196351.

It is an arithmetic number, because the mean of its divisors is an integer number (807161355).

Almost surely, 2^6394503421 is an apocalyptic number.

It is an amenable number.

6394503421 is a deficient number, since it is larger than the sum of its proper divisors (62787419).

6394503421 is a wasteful number, since it uses less digits than its factorization.

6394503421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37583.

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 6394503421 is about 79965.6390020114. The cubic root of 6394503421 is about 1856.1038632988.

The spelling of 6394503421 in words is "six billion, three hundred ninety-four million, five hundred three thousand, four hundred twenty-one".