1956871013 has 2 divisors, whose sum is σ = 1956871014. Its totient is φ = 1956871012.

The previous prime is 1956870977. The next prime is 1956871031. The reversal of 1956871013 is 3101786591.

Together with next prime (1956871031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1655431969 + 301439044 = 40687^2 + 17362^2 .

It is an emirp because it is prime and its reverse (3101786591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1956871013 - 2⁸ = 1956870757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1956871093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978435506 + 978435507.

It is an arithmetic number, because the mean of its divisors is an integer number (978435507).

Almost surely, 2^1956871013 is an apocalyptic number.

It is an amenable number.

1956871013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956871013 is an equidigital number, since it uses as much as digits as its factorization.

1956871013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 1956871013 is about 44236.5348213442. The cubic root of 1956871013 is about 1250.7986390718.

The spelling of 1956871013 in words is "one billion, nine hundred fifty-six million, eight hundred seventy-one thousand, thirteen".