1317754621 has 2 divisors, whose sum is σ = 1317754622. Its totient is φ = 1317754620.

The previous prime is 1317754619. The next prime is 1317754657. The reversal of 1317754621 is 1264577131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177450596 + 140304025 = 34314^2 + 11845^2 .

It is a cyclic number.

It is not a de Polignac number, because 1317754621 - 2¹ = 1317754619 is a prime.

Together with 1317754619, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1317754601) 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 as a sum of consecutive naturals, namely, 658877310 + 658877311.

It is an arithmetic number, because the mean of its divisors is an integer number (658877311).

Almost surely, 2^1317754621 is an apocalyptic number.

It is an amenable number.

1317754621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1317754621 is an equidigital number, since it uses as much as digits as its factorization.

1317754621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35280, while the sum is 37.

The square root of 1317754621 is about 36300.8900855062. The cubic root of 1317754621 is about 1096.3389640667.

The spelling of 1317754621 in words is "one billion, three hundred seventeen million, seven hundred fifty-four thousand, six hundred twenty-one".