9980651 has 4 divisors (see below), whose sum is σ = 9987600. Its totient is φ = 9973704.

The previous prime is 9980629. The next prime is 9980693. The reversal of 9980651 is 1560899.

9980651 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1560899 = 67 ⋅23297.

It is a cyclic number.

It is not a de Polignac number, because 9980651 - 2¹⁸ = 9718507 is a prime.

It is a super-2 number, since 2×9980651² = 199226788767602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9980251) 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, 431 + ... + 4488.

It is an arithmetic number, because the mean of its divisors is an integer number (2496900).

Almost surely, 2^9980651 is an apocalyptic number.

9980651 is a deficient number, since it is larger than the sum of its proper divisors (6949).

9980651 is a wasteful number, since it uses less digits than its factorization.

9980651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6948.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 9980651 is about 3159.2168333307. The cubic root of 9980651 is about 215.3044254301.

The spelling of 9980651 in words is "nine million, nine hundred eighty thousand, six hundred fifty-one".