7969825 has 6 divisors (see below), whose sum is σ = 9882614. Its totient is φ = 6375840.

The previous prime is 7969823. The next prime is 7969849. The reversal of 7969825 is 5289697.

7969825 = T₄₂₃ + T₄₂₄ + ... + T₄₉₇.

It can be written as a sum of positive squares in 3 ways, for example, as 135424 + 7834401 = 368^2 + 2799^2 .

It is not a de Polignac number, because 7969825 - 2¹ = 7969823 is a prime.

It is a super-2 number, since 2×7969825² = 127036221061250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7969823) 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 5 ways as a sum of consecutive naturals, for example, 159372 + ... + 159421.

Almost surely, 2^7969825 is an apocalyptic number.

It is an amenable number.

7969825 is a deficient number, since it is larger than the sum of its proper divisors (1912789).

7969825 is a wasteful number, since it uses less digits than its factorization.

7969825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318803 (or 318798 counting only the distinct ones).

The product of its digits is 272160, while the sum is 46.

The square root of 7969825 is about 2823.0878484383. The cubic root of 7969825 is about 199.7482248460.

The spelling of 7969825 in words is "seven million, nine hundred sixty-nine thousand, eight hundred twenty-five".