9890330957 has 4 divisors (see below), whose sum is σ = 10651125660. Its totient is φ = 9129536256.

The previous prime is 9890330881. The next prime is 9890330987. The reversal of 9890330957 is 7590330989.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3404605801 + 6485725156 = 58349^2 + 80534^2 .

It is a cyclic number.

It is not a de Polignac number, because 9890330957 - 2¹⁸ = 9890068813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9890330899 and 9890330908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9890330987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380397332 + ... + 380397357.

It is an arithmetic number, because the mean of its divisors is an integer number (2662781415).

Almost surely, 2^9890330957 is an apocalyptic number.

It is an amenable number.

9890330957 is a deficient number, since it is larger than the sum of its proper divisors (760794703).

9890330957 is a wasteful number, since it uses less digits than its factorization.

9890330957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760794702.

The product of its (nonzero) digits is 1837080, while the sum is 53.

The square root of 9890330957 is about 99450.1430717925. The cubic root of 9890330957 is about 2146.5298958224.

The spelling of 9890330957 in words is "nine billion, eight hundred ninety million, three hundred thirty thousand, nine hundred fifty-seven".