1938397523 has 2 divisors, whose sum is σ = 1938397524. Its totient is φ = 1938397522.

The previous prime is 1938397501. The next prime is 1938397529. The reversal of 1938397523 is 3257938391.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1938397523 - 2⁶ = 1938397459 is a prime.

It is not a weakly prime, because it can be changed into another prime (1938397529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969198761 + 969198762.

It is an arithmetic number, because the mean of its divisors is an integer number (969198762).

Almost surely, 2^1938397523 is an apocalyptic number.

1938397523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1938397523 is an equidigital number, since it uses as much as digits as its factorization.

1938397523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1224720, while the sum is 50.

The square root of 1938397523 is about 44027.2361499107. The cubic root of 1938397523 is about 1246.8502079547.

The spelling of 1938397523 in words is "one billion, nine hundred thirty-eight million, three hundred ninety-seven thousand, five hundred twenty-three".