1938000878623 has 2 divisors, whose sum is σ = 1938000878624. Its totient is φ = 1938000878622.

The previous prime is 1938000878591. The next prime is 1938000878659. The reversal of 1938000878623 is 3268780008391.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1938000878623 - 2⁵ = 1938000878591 is a prime.

It is a super-2 number, since 2×1938000878623² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1938000878423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969000439311 + 969000439312.

It is an arithmetic number, because the mean of its divisors is an integer number (969000439312).

Almost surely, 2^{1938000878623} is an apocalyptic number.

1938000878623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938000878623 is an equidigital number, since it uses as much as digits as its factorization.

1938000878623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 1938000878623 in words is "one trillion, nine hundred thirty-eight billion, eight hundred seventy-eight thousand, six hundred twenty-three".