1925709381 has 12 divisors (see below), whose sum is σ = 2790359052. Its totient is φ = 1279754496.

The previous prime is 1925709353. The next prime is 1925709397. The reversal of 1925709381 is 1839075291.

1925709381 is a `hidden beast` number, since 19 + 257 + 0 + 9 + 381 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 794732481 + 1130976900 = 28191^2 + 33630^2 .

It is not a de Polignac number, because 1925709381 - 2⁵ = 1925709349 is a prime.

It is a super-2 number, since 2×1925709381² = 7416713240142806322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1925709341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 334636 + ... + 340341.

It is an arithmetic number, because the mean of its divisors is an integer number (232529921).

Almost surely, 2^1925709381 is an apocalyptic number.

It is an amenable number.

1925709381 is a deficient number, since it is larger than the sum of its proper divisors (864649671).

1925709381 is a wasteful number, since it uses less digits than its factorization.

1925709381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675300 (or 675297 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 1925709381 is about 43882.9053390953. The cubic root of 1925709381 is about 1244.1237536838.

The spelling of 1925709381 in words is "one billion, nine hundred twenty-five million, seven hundred nine thousand, three hundred eighty-one".