72278027 has 2 divisors, whose sum is σ = 72278028. Its totient is φ = 72278026.

The previous prime is 72278021. The next prime is 72278051. The reversal of 72278027 is 72087227.

It is a weak prime.

It is an emirp because it is prime and its reverse (72087227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72278027 - 2¹² = 72273931 is a prime.

It is a super-2 number, since 2×72278027² = 10448226374025458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72278021) 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, 36139013 + 36139014.

It is an arithmetic number, because the mean of its divisors is an integer number (36139014).

Almost surely, 2^72278027 is an apocalyptic number.

72278027 is a deficient number, since it is larger than the sum of its proper divisors (1).

72278027 is an equidigital number, since it uses as much as digits as its factorization.

72278027 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 72278027 is about 8501.6484872053. The cubic root of 72278027 is about 416.5515578206.

The spelling of 72278027 in words is "seventy-two million, two hundred seventy-eight thousand, twenty-seven".