72272273 has 2 divisors, whose sum is σ = 72272274. Its totient is φ = 72272272.

The previous prime is 72272269. The next prime is 72272303. The reversal of 72272273 is 37227227.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47789569 + 24482704 = 6913^2 + 4948^2 .

It is a cyclic number.

It is not a de Polignac number, because 72272273 - 2² = 72272269 is a prime.

It is not a weakly prime, because it can be changed into another prime (72272203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36136136 + 36136137.

It is an arithmetic number, because the mean of its divisors is an integer number (36136137).

Almost surely, 2^72272273 is an apocalyptic number.

It is an amenable number.

72272273 is a deficient number, since it is larger than the sum of its proper divisors (1).

72272273 is an equidigital number, since it uses as much as digits as its factorization.

72272273 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16464, while the sum is 32.

The square root of 72272273 is about 8501.3100755119. The cubic root of 72272273 is about 416.5405037406.

The spelling of 72272273 in words is "seventy-two million, two hundred seventy-two thousand, two hundred seventy-three".