1938669725 has 12 divisors (see below), whose sum is σ = 2405033940. Its totient is φ = 1550236800.

The previous prime is 1938669721. The next prime is 1938669727. The reversal of 1938669725 is 5279668391.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 76143076 + 1862526649 = 8726^2 + 43157^2 .

It is not a de Polignac number, because 1938669725 - 2² = 1938669721 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1938669721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43241 + ... + 75809.

It is an arithmetic number, because the mean of its divisors is an integer number (200419495).

Almost surely, 2^1938669725 is an apocalyptic number.

It is an amenable number.

1938669725 is a deficient number, since it is larger than the sum of its proper divisors (466364215).

1938669725 is a wasteful number, since it uses less digits than its factorization.

1938669725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34960 (or 34955 counting only the distinct ones).

The product of its digits is 4898880, while the sum is 56.

The square root of 1938669725 is about 44030.3273324194. The cubic root of 1938669725 is about 1246.9085687451.

The spelling of 1938669725 in words is "one billion, nine hundred thirty-eight million, six hundred sixty-nine thousand, seven hundred twenty-five".