9890725 has 18 divisors (see below), whose sum is σ = 13286166. Its totient is φ = 7300800.

The previous prime is 9890693. The next prime is 9890737. The reversal of 9890725 is 5270989.

It can be written as a sum of positive squares in 9 ways, for example, as 5560164 + 4330561 = 2358^2 + 2081^2 .

It is not a de Polignac number, because 9890725 - 2⁵ = 9890693 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3055 + ... + 5395.

Almost surely, 2^9890725 is an apocalyptic number.

It is an amenable number.

9890725 is a deficient number, since it is larger than the sum of its proper divisors (3395441).

9890725 is a wasteful number, since it uses less digits than its factorization.

9890725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377 (or 2359 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 40.

The square root of 9890725 is about 3144.9523048848. The cubic root of 9890725 is about 214.6558402245.

The spelling of 9890725 in words is "nine million, eight hundred ninety thousand, seven hundred twenty-five".