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9920399 is a prime number
BaseRepresentation
bin100101110101…
…111110001111
3200200000020012
4211311332033
510014423044
6552343435
7150215306
oct45657617
920600205
109920399
115666385
1233a4b7b
132094578
14146343d
15d0e59e
hex975f8f

9920399 has 2 divisors, whose sum is σ = 9920400. Its totient is φ = 9920398.

The previous prime is 9920387. The next prime is 9920411. The reversal of 9920399 is 9930299.

It is a balanced prime because it is at equal distance from previous prime (9920387) and next prime (9920411).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-9920399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9922399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4960199 + 4960200.

It is an arithmetic number, because the mean of its divisors is an integer number (4960200).

Almost surely, 29920399 is an apocalyptic number.

9920399 is a deficient number, since it is larger than the sum of its proper divisors (1).

9920399 is an equidigital number, since it uses as much as digits as its factorization.

9920399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39366, while the sum is 41.

The square root of 9920399 is about 3149.6664902812. Note that the first 3 decimals coincide. The cubic root of 9920399 is about 214.8702949420.

The spelling of 9920399 in words is "nine million, nine hundred twenty thousand, three hundred ninety-nine".