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80630261 is a prime number
BaseRepresentation
bin1001100111001…
…01000111110101
312121201102220222
410303211013311
5131120132021
612000104125
71666226435
oct463450765
9177642828
1080630261
1141571788
1223005045
131392121a
14a9cc2c5
15712a6ab
hex4ce51f5

80630261 has 2 divisors, whose sum is σ = 80630262. Its totient is φ = 80630260.

The previous prime is 80630257. The next prime is 80630293. The reversal of 80630261 is 16203608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54671236 + 25959025 = 7394^2 + 5095^2 .

It is a cyclic number.

It is not a de Polignac number, because 80630261 - 22 = 80630257 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 80630261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80632261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40315130 + 40315131.

It is an arithmetic number, because the mean of its divisors is an integer number (40315131).

Almost surely, 280630261 is an apocalyptic number.

It is an amenable number.

80630261 is a deficient number, since it is larger than the sum of its proper divisors (1).

80630261 is an equidigital number, since it uses as much as digits as its factorization.

80630261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 80630261 is about 8979.4354499601. The cubic root of 80630261 is about 432.0155262052.

Adding to 80630261 its reverse (16203608), we get a palindrome (96833869).

The spelling of 80630261 in words is "eighty million, six hundred thirty thousand, two hundred sixty-one".