1938545975 has 6 divisors (see below), whose sum is σ = 2403797040. Its totient is φ = 1550836760.

The previous prime is 1938545951. The next prime is 1938546011. The reversal of 1938545975 is 5795458391.

It is a happy number.

It is not a de Polignac number, because 1938545975 - 2²⁶ = 1871437111 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1938545975.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38770895 + ... + 38770944.

It is an arithmetic number, because the mean of its divisors is an integer number (400632840).

Almost surely, 2^1938545975 is an apocalyptic number.

1938545975 is a deficient number, since it is larger than the sum of its proper divisors (465251065).

1938545975 is an equidigital number, since it uses as much as digits as its factorization.

1938545975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77541849 (or 77541844 counting only the distinct ones).

The product of its digits is 6804000, while the sum is 56.

The square root of 1938545975 is about 44028.9220285939. The cubic root of 1938545975 is about 1246.8820371125.

The spelling of 1938545975 in words is "one billion, nine hundred thirty-eight million, five hundred forty-five thousand, nine hundred seventy-five".