1925129009 has 2 divisors, whose sum is σ = 1925129010. Its totient is φ = 1925129008.

The previous prime is 1925128999. The next prime is 1925129051. The reversal of 1925129009 is 9009215291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1376632609 + 548496400 = 37103^2 + 23420^2 .

It is a cyclic number.

It is not a de Polignac number, because 1925129009 - 2⁴ = 1925128993 is a prime.

It is a super-2 number, since 2×1925129009² = 7412243402586644162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1925129099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 962564504 + 962564505.

It is an arithmetic number, because the mean of its divisors is an integer number (962564505).

Almost surely, 2^1925129009 is an apocalyptic number.

It is an amenable number.

1925129009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1925129009 is an equidigital number, since it uses as much as digits as its factorization.

1925129009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14580, while the sum is 38.

The square root of 1925129009 is about 43876.2921063300. The cubic root of 1925129009 is about 1243.9987560859.

The spelling of 1925129009 in words is "one billion, nine hundred twenty-five million, one hundred twenty-nine thousand, nine".