72272149 has 2 divisors, whose sum is σ = 72272150. Its totient is φ = 72272148.

The previous prime is 72272111. The next prime is 72272153. The reversal of 72272149 is 94127227.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63091249 + 9180900 = 7943^2 + 3030^2 .

It is an emirp because it is prime and its reverse (94127227) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72272149 - 2¹⁵ = 72239381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72272449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36136074 + 36136075.

It is an arithmetic number, because the mean of its divisors is an integer number (36136075).

Almost surely, 2^72272149 is an apocalyptic number.

It is an amenable number.

72272149 is a deficient number, since it is larger than the sum of its proper divisors (1).

72272149 is an equidigital number, since it uses as much as digits as its factorization.

72272149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 34.

The square root of 72272149 is about 8501.3027825152. The cubic root of 72272149 is about 416.5402655163.

The spelling of 72272149 in words is "seventy-two million, two hundred seventy-two thousand, one hundred forty-nine".