1306497387 has 48 divisors (see below), whose sum is σ = 1981012992. Its totient is φ = 760415040.

The previous prime is 1306497377. The next prime is 1306497389. The reversal of 1306497387 is 7837946031.

It is not a de Polignac number, because 1306497387 - 2⁴ = 1306497371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1306497389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10287318 + ... + 10287444.

It is an arithmetic number, because the mean of its divisors is an integer number (41271104).

Almost surely, 2^1306497387 is an apocalyptic number.

1306497387 is a deficient number, since it is larger than the sum of its proper divisors (674515605).

1306497387 is a wasteful number, since it uses less digits than its factorization.

1306497387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 48.

The square root of 1306497387 is about 36145.5029982984. The cubic root of 1306497387 is about 1093.2081191395.

The spelling of 1306497387 in words is "one billion, three hundred six million, four hundred ninety-seven thousand, three hundred eighty-seven".