9867039725 has 6 divisors (see below), whose sum is σ = 12235129290. Its totient is φ = 7893631760.

The previous prime is 9867039719. The next prime is 9867039727. The reversal of 9867039725 is 5279307689.

It can be written as a sum of positive squares in 3 ways, for example, as 165971689 + 9701068036 = 12883^2 + 98494^2 .

It is not a de Polignac number, because 9867039725 - 2⁴ = 9867039709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9867039727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 197340770 + ... + 197340819.

It is an arithmetic number, because the mean of its divisors is an integer number (2039188215).

Almost surely, 2^9867039725 is an apocalyptic number.

It is an amenable number.

9867039725 is a deficient number, since it is larger than the sum of its proper divisors (2368089565).

9867039725 is a wasteful number, since it uses less digits than its factorization.

9867039725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394681599 (or 394681594 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 56.

The square root of 9867039725 is about 99332.9740066208. The cubic root of 9867039725 is about 2144.8435814165.

The spelling of 9867039725 in words is "nine billion, eight hundred sixty-seven million, thirty-nine thousand, seven hundred twenty-five".