1513676861 has 2 divisors, whose sum is σ = 1513676862. Its totient is φ = 1513676860.

The previous prime is 1513676789. The next prime is 1513676863. The reversal of 1513676861 is 1686763151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1513676836 + 25 = 38906^2 + 5^2 .

It is an emirp because it is prime and its reverse (1686763151) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1513676861 - 2¹⁰ = 1513675837 is a prime.

It is a Sophie Germain prime.

Together with 1513676863, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1513676863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 756838430 + 756838431.

It is an arithmetic number, because the mean of its divisors is an integer number (756838431).

Almost surely, 2^1513676861 is an apocalyptic number.

It is an amenable number.

1513676861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1513676861 is an equidigital number, since it uses as much as digits as its factorization.

1513676861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 44.

The square root of 1513676861 is about 38906.0003212872. Note that the first 3 decimals coincide. The cubic root of 1513676861 is about 1148.1828544520.

The spelling of 1513676861 in words is "one billion, five hundred thirteen million, six hundred seventy-six thousand, eight hundred sixty-one".