1938801013 has 2 divisors, whose sum is σ = 1938801014. Its totient is φ = 1938801012.

The previous prime is 1938800971. The next prime is 1938801037. The reversal of 1938801013 is 3101088391.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1806505009 + 132296004 = 42503^2 + 11502^2 .

It is an emirp because it is prime and its reverse (3101088391) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1938801013 is a prime.

It is a super-3 number, since 3×1938801013³ (a number of 29 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1938801013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1938801083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969400506 + 969400507.

It is an arithmetic number, because the mean of its divisors is an integer number (969400507).

Almost surely, 2^1938801013 is an apocalyptic number.

It is an amenable number.

1938801013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938801013 is an equidigital number, since it uses as much as digits as its factorization.

1938801013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 1938801013 is about 44031.8181886690. The cubic root of 1938801013 is about 1246.9367152683.

The spelling of 1938801013 in words is "one billion, nine hundred thirty-eight million, eight hundred one thousand, thirteen".