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72255769 is a prime number
BaseRepresentation
bin1000100111010…
…00100100011001
312000221222021121
410103220210121
5121444141034
611100405241
71535110135
oct423504431
9160858247
1072255769
1137871913
1220246821
1311c7b4c1
14984c3c5
1565241b4
hex44e8919

72255769 has 2 divisors, whose sum is σ = 72255770. Its totient is φ = 72255768.

The previous prime is 72255767. The next prime is 72255847. The reversal of 72255769 is 96755227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56550400 + 15705369 = 7520^2 + 3963^2 .

It is a cyclic number.

It is not a de Polignac number, because 72255769 - 21 = 72255767 is a prime.

It is a super-2 number, since 2×722557692 = 10441792307562722, which contains 22 as substring.

Together with 72255767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (72255767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36127884 + 36127885.

It is an arithmetic number, because the mean of its divisors is an integer number (36127885).

Almost surely, 272255769 is an apocalyptic number.

It is an amenable number.

72255769 is a deficient number, since it is larger than the sum of its proper divisors (1).

72255769 is an equidigital number, since it uses as much as digits as its factorization.

72255769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264600, while the sum is 43.

The square root of 72255769 is about 8500.3393461673. The cubic root of 72255769 is about 416.5087944486.

The spelling of 72255769 in words is "seventy-two million, two hundred fifty-five thousand, seven hundred sixty-nine".