Search a number
-
+
72821267 is a prime number
BaseRepresentation
bin1000101011100…
…10101000010011
312002000200222222
410111302220103
5122120240032
611120451255
71542653621
oct425625023
9162020888
1072821267
1138118772
1220479b2b
1312118a0c
149958511
1565d6a12
hex4572a13

72821267 has 2 divisors, whose sum is σ = 72821268. Its totient is φ = 72821266.

The previous prime is 72821257. The next prime is 72821269. The reversal of 72821267 is 76212827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72821267 - 28 = 72821011 is a prime.

Together with 72821269, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72821269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36410633 + 36410634.

It is an arithmetic number, because the mean of its divisors is an integer number (36410634).

Almost surely, 272821267 is an apocalyptic number.

72821267 is a deficient number, since it is larger than the sum of its proper divisors (1).

72821267 is an equidigital number, since it uses as much as digits as its factorization.

72821267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18816, while the sum is 35.

The square root of 72821267 is about 8533.5377774988. The cubic root of 72821267 is about 417.5925514634.

The spelling of 72821267 in words is "seventy-two million, eight hundred twenty-one thousand, two hundred sixty-seven".