1304387047 has 4 divisors (see below), whose sum is σ = 1304460360. Its totient is φ = 1304313736.

The previous prime is 1304387039. The next prime is 1304387059. The reversal of 1304387047 is 7407834031.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1304387047 - 2³ = 1304387039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1304386997 and 1304387015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1304387347) 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, 8928 + ... + 51850.

It is an arithmetic number, because the mean of its divisors is an integer number (326115090).

Almost surely, 2^1304387047 is an apocalyptic number.

1304387047 is a deficient number, since it is larger than the sum of its proper divisors (73313).

1304387047 is an equidigital number, since it uses as much as digits as its factorization.

1304387047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73312.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 1304387047 is about 36116.2989106027. The cubic root of 1304387047 is about 1092.6191948595.

The spelling of 1304387047 in words is "one billion, three hundred four million, three hundred eighty-seven thousand, forty-seven".