1308729487 has 8 divisors (see below), whose sum is σ = 1458001440. Its totient is φ = 1166400480.

The previous prime is 1308729437. The next prime is 1308729493. The reversal of 1308729487 is 7849278031.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1308729487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1308729487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1308729437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1735339 + ... + 1736092.

It is an arithmetic number, because the mean of its divisors is an integer number (182250180).

Almost surely, 2^1308729487 is an apocalyptic number.

1308729487 is a deficient number, since it is larger than the sum of its proper divisors (149271953).

1308729487 is a wasteful number, since it uses less digits than its factorization.

1308729487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471473.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 1308729487 is about 36176.3664151059. The cubic root of 1308729487 is about 1093.8303327903.

The spelling of 1308729487 in words is "one billion, three hundred eight million, seven hundred twenty-nine thousand, four hundred eighty-seven".