72278053 has 2 divisors, whose sum is σ = 72278054. Its totient is φ = 72278052.

The previous prime is 72278051. The next prime is 72278083. The reversal of 72278053 is 35087227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45724644 + 26553409 = 6762^2 + 5153^2 .

It is a cyclic number.

It is not a de Polignac number, because 72278053 - 2¹ = 72278051 is a prime.

Together with 72278051, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72278051) 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, 36139026 + 36139027.

It is an arithmetic number, because the mean of its divisors is an integer number (36139027).

Almost surely, 2^72278053 is an apocalyptic number.

It is an amenable number.

72278053 is a deficient number, since it is larger than the sum of its proper divisors (1).

72278053 is an equidigital number, since it uses as much as digits as its factorization.

72278053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23520, while the sum is 34.

The square root of 72278053 is about 8501.6500163204. The cubic root of 72278053 is about 416.5516077682.

The spelling of 72278053 in words is "seventy-two million, two hundred seventy-eight thousand, fifty-three".