1938100973 has 2 divisors, whose sum is σ = 1938100974. Its totient is φ = 1938100972.

The previous prime is 1938100949. The next prime is 1938101021. The reversal of 1938100973 is 3790018391.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1824827524 + 113273449 = 42718^2 + 10643^2 .

It is an emirp because it is prime and its reverse (3790018391) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1938100973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1938100973.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1938108973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969050486 + 969050487.

It is an arithmetic number, because the mean of its divisors is an integer number (969050487).

Almost surely, 2^1938100973 is an apocalyptic number.

It is an amenable number.

1938100973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938100973 is an equidigital number, since it uses as much as digits as its factorization.

1938100973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 1938100973 is about 44023.8682194103. The cubic root of 1938100973 is about 1246.7866206732.

The spelling of 1938100973 in words is "one billion, nine hundred thirty-eight million, one hundred thousand, nine hundred seventy-three".