72245489 has 2 divisors, whose sum is σ = 72245490. Its totient is φ = 72245488.

The previous prime is 72245479. The next prime is 72245491. The reversal of 72245489 is 98454227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54538225 + 17707264 = 7385^2 + 4208^2 .

It is a cyclic number.

It is not a de Polignac number, because 72245489 - 2⁴ = 72245473 is a prime.

Together with 72245491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72245419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36122744 + 36122745.

It is an arithmetic number, because the mean of its divisors is an integer number (36122745).

Almost surely, 2^72245489 is an apocalyptic number.

It is an amenable number.

72245489 is a deficient number, since it is larger than the sum of its proper divisors (1).

72245489 is an equidigital number, since it uses as much as digits as its factorization.

72245489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 41.

The square root of 72245489 is about 8499.7346429168. The cubic root of 72245489 is about 416.4890409464.

The spelling of 72245489 in words is "seventy-two million, two hundred forty-five thousand, four hundred eighty-nine".