1947223625 has 8 divisors (see below), whose sum is σ = 2430135240. Its totient is φ = 1557778800.

The previous prime is 1947223561. The next prime is 1947223627. The reversal of 1947223625 is 5263227491.

It can be written as a sum of positive squares in 4 ways, for example, as 913936 + 1946309689 = 956^2 + 44117^2 .

It is not a de Polignac number, because 1947223625 - 2⁶ = 1947223561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1947223627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7788770 + ... + 7789019.

It is an arithmetic number, because the mean of its divisors is an integer number (303766905).

Almost surely, 2^1947223625 is an apocalyptic number.

It is an amenable number.

1947223625 is a deficient number, since it is larger than the sum of its proper divisors (482911615).

1947223625 is an equidigital number, since it uses as much as digits as its factorization.

1947223625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15577804 (or 15577794 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 1947223625 is about 44127.3568775652. The cubic root of 1947223625 is about 1248.7397698830.

The spelling of 1947223625 in words is "one billion, nine hundred forty-seven million, two hundred twenty-three thousand, six hundred twenty-five".