1918005907 has 2 divisors, whose sum is σ = 1918005908. Its totient is φ = 1918005906.

The previous prime is 1918005883. The next prime is 1918005913. The reversal of 1918005907 is 7095008191.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1918005907 - 2⁷ = 1918005779 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1918005907.

It is not a weakly prime, because it can be changed into another prime (1918005937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959002953 + 959002954.

It is an arithmetic number, because the mean of its divisors is an integer number (959002954).

Almost surely, 2^1918005907 is an apocalyptic number.

1918005907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918005907 is an equidigital number, since it uses as much as digits as its factorization.

1918005907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 1918005907 is about 43795.0443201054. The cubic root of 1918005907 is about 1242.4625678745.

The spelling of 1918005907 in words is "one billion, nine hundred eighteen million, five thousand, nine hundred seven".