1348478639 has 4 divisors (see below), whose sum is σ = 1349390640. Its totient is φ = 1347566640.

The previous prime is 1348478623. The next prime is 1348478657. The reversal of 1348478639 is 9368748431.

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 1348478639 - 2⁴ = 1348478623 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 (1348478669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453779 + ... + 456740.

It is an arithmetic number, because the mean of its divisors is an integer number (337347660).

Almost surely, 2^1348478639 is an apocalyptic number.

1348478639 is a deficient number, since it is larger than the sum of its proper divisors (912001).

1348478639 is an equidigital number, since it uses as much as digits as its factorization.

1348478639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912000.

The product of its digits is 3483648, while the sum is 53.

The square root of 1348478639 is about 36721.6372047870. The cubic root of 1348478639 is about 1104.7941274769.

The spelling of 1348478639 in words is "one billion, three hundred forty-eight million, four hundred seventy-eight thousand, six hundred thirty-nine".