Search a number
-
+
72673213 is a prime number
BaseRepresentation
bin1000101010011…
…10011110111101
312001202011220111
410111032132331
5122101020323
611113350021
71541466154
oct425163675
9161664814
1072673213
1138027508
1220408311
1312096502
14991a59b
1565a7c0d
hex454e7bd

72673213 has 2 divisors, whose sum is σ = 72673214. Its totient is φ = 72673212.

The previous prime is 72673199. The next prime is 72673241. The reversal of 72673213 is 31237627.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72641529 + 31684 = 8523^2 + 178^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-72673213 is a prime.

It is equal to p4265950 and since 72673213 and 4265950 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36336606 + 36336607.

It is an arithmetic number, because the mean of its divisors is an integer number (36336607).

Almost surely, 272673213 is an apocalyptic number.

It is an amenable number.

72673213 is a deficient number, since it is larger than the sum of its proper divisors (1).

72673213 is an equidigital number, since it uses as much as digits as its factorization.

72673213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 31.

The square root of 72673213 is about 8524.8585325506. The cubic root of 72673213 is about 417.3093549125.

The spelling of 72673213 in words is "seventy-two million, six hundred seventy-three thousand, two hundred thirteen".