1913794637 has 2 divisors, whose sum is σ = 1913794638. Its totient is φ = 1913794636.

The previous prime is 1913794613. The next prime is 1913794639. The reversal of 1913794637 is 7364973191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1891032196 + 22762441 = 43486^2 + 4771^2 .

It is a cyclic number.

It is not a de Polignac number, because 1913794637 - 2⁸ = 1913794381 is a prime.

Together with 1913794639, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1913794639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 956897318 + 956897319.

It is an arithmetic number, because the mean of its divisors is an integer number (956897319).

Almost surely, 2^1913794637 is an apocalyptic number.

It is an amenable number.

1913794637 is a deficient number, since it is larger than the sum of its proper divisors (1).

1913794637 is an equidigital number, since it uses as much as digits as its factorization.

1913794637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 50.

The square root of 1913794637 is about 43746.9386014610. The cubic root of 1913794637 is about 1241.5525638153.

The spelling of 1913794637 in words is "one billion, nine hundred thirteen million, seven hundred ninety-four thousand, six hundred thirty-seven".