72285497 has 2 divisors, whose sum is σ = 72285498. Its totient is φ = 72285496.

The previous prime is 72285439. The next prime is 72285539. The reversal of 72285497 is 79458227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72267001 + 18496 = 8501^2 + 136^2 .

It is an emirp because it is prime and its reverse (79458227) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72285497 is a prime.

It is not a weakly prime, because it can be changed into another prime (72285097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36142748 + 36142749.

It is an arithmetic number, because the mean of its divisors is an integer number (36142749).

Almost surely, 2^72285497 is an apocalyptic number.

It is an amenable number.

72285497 is a deficient number, since it is larger than the sum of its proper divisors (1).

72285497 is an equidigital number, since it uses as much as digits as its factorization.

72285497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 44.

The square root of 72285497 is about 8502.0878024165. The cubic root of 72285497 is about 416.5659076540.

The spelling of 72285497 in words is "seventy-two million, two hundred eighty-five thousand, four hundred ninety-seven".