72522397 has 2 divisors, whose sum is σ = 72522398. Its totient is φ = 72522396.

The previous prime is 72522377. The next prime is 72522407. The reversal of 72522397 is 79322527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71132356 + 1390041 = 8434^2 + 1179^2 .

It is a cyclic number.

It is not a de Polignac number, because 72522397 - 2¹⁹ = 71998109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72522377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36261198 + 36261199.

It is an arithmetic number, because the mean of its divisors is an integer number (36261199).

Almost surely, 2^72522397 is an apocalyptic number.

It is an amenable number.

72522397 is a deficient number, since it is larger than the sum of its proper divisors (1).

72522397 is an equidigital number, since it uses as much as digits as its factorization.

72522397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 37.

The square root of 72522397 is about 8516.0082785305. The cubic root of 72522397 is about 417.0204794923.

The spelling of 72522397 in words is "seventy-two million, five hundred twenty-two thousand, three hundred ninety-seven".