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646389097 is a prime number
BaseRepresentation
bin100110100001110…
…001110101101001
31200001021222010221
4212201301311221
52310433422342
6144050210041
722006134214
oct4641616551
91601258127
10646389097
11301962772
12160583921
13a3bbb573
1461bc077b
153bb32a67
hex26871d69

646389097 has 2 divisors, whose sum is σ = 646389098. Its totient is φ = 646389096.

The previous prime is 646389089. The next prime is 646389109. The reversal of 646389097 is 790983646.

646389097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558329641 + 88059456 = 23629^2 + 9384^2 .

It is a cyclic number.

It is not a de Polignac number, because 646389097 - 23 = 646389089 is a prime.

It is not a weakly prime, because it can be changed into another prime (646389197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323194548 + 323194549.

It is an arithmetic number, because the mean of its divisors is an integer number (323194549).

Almost surely, 2646389097 is an apocalyptic number.

It is an amenable number.

646389097 is a deficient number, since it is larger than the sum of its proper divisors (1).

646389097 is an equidigital number, since it uses as much as digits as its factorization.

646389097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 52.

The square root of 646389097 is about 25424.1833103838. The cubic root of 646389097 is about 864.6320717973.

The spelling of 646389097 in words is "six hundred forty-six million, three hundred eighty-nine thousand, ninety-seven".