1304705987 has 16 divisors (see below), whose sum is σ = 1497609792. Its totient is φ = 1125964800.

The previous prime is 1304705971. The next prime is 1304706017. The reversal of 1304705987 is 7895074031.

It is a cyclic number.

It is not a de Polignac number, because 1304705987 - 2⁴ = 1304705971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1304708987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13823 + ... + 52919.

It is an arithmetic number, because the mean of its divisors is an integer number (93600612).

Almost surely, 2^1304705987 is an apocalyptic number.

1304705987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1304705987 is a deficient number, since it is larger than the sum of its proper divisors (192903805).

1304705987 is a wasteful number, since it uses less digits than its factorization.

1304705987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39278.

The product of its (nonzero) digits is 211680, while the sum is 44.

The square root of 1304705987 is about 36120.7140986997. The cubic root of 1304705987 is about 1092.7082409158.

The spelling of 1304705987 in words is "one billion, three hundred four million, seven hundred five thousand, nine hundred eighty-seven".