6473139787 has 4 divisors (see below), whose sum is σ = 6484476856. Its totient is φ = 6461802720.

The previous prime is 6473139781. The next prime is 6473139797. The reversal of 6473139787 is 7879313746.

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 6473139787 - 2³ = 6473139779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6473139781) 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, 5667678 + ... + 5668819.

It is an arithmetic number, because the mean of its divisors is an integer number (1621119214).

Almost surely, 2^6473139787 is an apocalyptic number.

6473139787 is a deficient number, since it is larger than the sum of its proper divisors (11337069).

6473139787 is a wasteful number, since it uses less digits than its factorization.

6473139787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11337068.

The product of its digits is 5334336, while the sum is 55.

The square root of 6473139787 is about 80455.8250656843. The cubic root of 6473139787 is about 1863.6813614861.

The spelling of 6473139787 in words is "six billion, four hundred seventy-three million, one hundred thirty-nine thousand, seven hundred eighty-seven".