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16625009 is a prime number
BaseRepresentation
bin111111011010…
…110101110001
31011021122020002
4333122311301
513224000014
61352155345
7261211262
oct77326561
934248202
1016625009
119425685
125698b55
1335a11ab
1422ca969
1516d5dde
hexfdad71

16625009 has 2 divisors, whose sum is σ = 16625010. Its totient is φ = 16625008.

The previous prime is 16624999. The next prime is 16625023. The reversal of 16625009 is 90052661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11242609 + 5382400 = 3353^2 + 2320^2 .

It is a cyclic number.

It is not a de Polignac number, because 16625009 - 212 = 16620913 is a prime.

It is not a weakly prime, because it can be changed into another prime (16625029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8312504 + 8312505.

It is an arithmetic number, because the mean of its divisors is an integer number (8312505).

Almost surely, 216625009 is an apocalyptic number.

It is an amenable number.

16625009 is a deficient number, since it is larger than the sum of its proper divisors (1).

16625009 is an equidigital number, since it uses as much as digits as its factorization.

16625009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 16625009 is about 4077.3777112257. The cubic root of 16625009 is about 255.2234821554.

The spelling of 16625009 in words is "sixteen million, six hundred twenty-five thousand, nine".