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7930649 is a prime number
BaseRepresentation
bin11110010000001100011001
3112220220210202
4132100030121
54012240044
6441551545
7124260266
oct36201431
915826722
107930649
114527461
1227a55b5
1318489bc
1410a626d
15a69c4e
hex790319

7930649 has 2 divisors, whose sum is σ = 7930650. Its totient is φ = 7930648.

The previous prime is 7930597. The next prime is 7930651. The reversal of 7930649 is 9460397.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6538249 + 1392400 = 2557^2 + 1180^2 .

It is an emirp because it is prime and its reverse (9460397) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7930649 - 28 = 7930393 is a prime.

It is a super-2 number, since 2×79306492 = 125790387122402, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 7930651, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7930849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3965324 + 3965325.

It is an arithmetic number, because the mean of its divisors is an integer number (3965325).

Almost surely, 27930649 is an apocalyptic number.

It is an amenable number.

7930649 is a deficient number, since it is larger than the sum of its proper divisors (1).

7930649 is an equidigital number, since it uses as much as digits as its factorization.

7930649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 7930649 is about 2816.1407990369. The cubic root of 7930649 is about 199.4203969240.

The spelling of 7930649 in words is "seven million, nine hundred thirty thousand, six hundred forty-nine".