1938161123 has 2 divisors, whose sum is σ = 1938161124. Its totient is φ = 1938161122.

The previous prime is 1938161111. The next prime is 1938161129. The reversal of 1938161123 is 3211618391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1938161123 - 2⁴ = 1938161107 is a prime.

It is a super-2 number, since 2×1938161123² = 7512937077417242258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1938161129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969080561 + 969080562.

It is an arithmetic number, because the mean of its divisors is an integer number (969080562).

Almost surely, 2^1938161123 is an apocalyptic number.

1938161123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938161123 is an equidigital number, since it uses as much as digits as its factorization.

1938161123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 35.

The square root of 1938161123 is about 44024.5513662547. The cubic root of 1938161123 is about 1246.7995187696.

The spelling of 1938161123 in words is "one billion, nine hundred thirty-eight million, one hundred sixty-one thousand, one hundred twenty-three".