9920513 has 2 divisors, whose sum is σ = 9920514. Its totient is φ = 9920512.

The previous prime is 9920507. The next prime is 9920531. The reversal of 9920513 is 3150299.

Together with next prime (9920531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9909904 + 10609 = 3148^2 + 103^2 .

It is a cyclic number.

It is not a de Polignac number, because 9920513 - 2⁸ = 9920257 is a prime.

It is a super-3 number, since 3×9920513³ (a number of 22 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (9920543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960256 + 4960257.

It is an arithmetic number, because the mean of its divisors is an integer number (4960257).

It is a Proth number, since it is equal to 1211 ⋅ 2¹³ + 1 and 1211 < 2¹³.

Almost surely, 2^9920513 is an apocalyptic number.

It is an amenable number.

9920513 is a deficient number, since it is larger than the sum of its proper divisors (1).

9920513 is an equidigital number, since it uses as much as digits as its factorization.

9920513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 9920513 is about 3149.6845873833. The cubic root of 9920513 is about 214.8711179976.

The spelling of 9920513 in words is "nine million, nine hundred twenty thousand, five hundred thirteen".