1317400647 has 32 divisors (see below), whose sum is σ = 1880064000. Its totient is φ = 818627040.

The previous prime is 1317400633. The next prime is 1317400649. The reversal of 1317400647 is 7460047131.

It is not a de Polignac number, because 1317400647 - 2⁷ = 1317400519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1317400649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 878104 + ... + 879602.

It is an arithmetic number, because the mean of its divisors is an integer number (58752000).

Almost surely, 2^1317400647 is an apocalyptic number.

1317400647 is a deficient number, since it is larger than the sum of its proper divisors (562663353).

1317400647 is a wasteful number, since it uses less digits than its factorization.

1317400647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1843.

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 1317400647 is about 36296.0142026642. The cubic root of 1317400647 is about 1096.2407894304.

Adding to 1317400647 its reverse (7460047131), we get a palindrome (8777447778).

The spelling of 1317400647 in words is "one billion, three hundred seventeen million, four hundred thousand, six hundred forty-seven".