1918709113 has 2 divisors, whose sum is σ = 1918709114. Its totient is φ = 1918709112.

The previous prime is 1918709069. The next prime is 1918709119. The reversal of 1918709113 is 3119078191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1362126649 + 556582464 = 36907^2 + 23592^2 .

It is an emirp because it is prime and its reverse (3119078191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1918709113 - 2¹⁷ = 1918578041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1918709119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959354556 + 959354557.

It is an arithmetic number, because the mean of its divisors is an integer number (959354557).

Almost surely, 2^1918709113 is an apocalyptic number.

It is an amenable number.

1918709113 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918709113 is an equidigital number, since it uses as much as digits as its factorization.

1918709113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 40.

The square root of 1918709113 is about 43803.0719584825. The cubic root of 1918709113 is about 1242.6143922900.

The spelling of 1918709113 in words is "one billion, nine hundred eighteen million, seven hundred nine thousand, one hundred thirteen".