152720317 has 2 divisors, whose sum is σ = 152720318. Its totient is φ = 152720316.

The previous prime is 152720311. The next prime is 152720341. The reversal of 152720317 is 713027251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128572921 + 24147396 = 11339^2 + 4914^2 .

It is an emirp because it is prime and its reverse (713027251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 152720317 - 2¹⁹ = 152196029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152720311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76360158 + 76360159.

It is an arithmetic number, because the mean of its divisors is an integer number (76360159).

Almost surely, 2^152720317 is an apocalyptic number.

It is an amenable number.

152720317 is a deficient number, since it is larger than the sum of its proper divisors (1).

152720317 is an equidigital number, since it uses as much as digits as its factorization.

152720317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 152720317 is about 12358.0061903205. The cubic root of 152720317 is about 534.5220257162.

Adding to 152720317 its reverse (713027251), we get a palindrome (865747568).

The spelling of 152720317 in words is "one hundred fifty-two million, seven hundred twenty thousand, three hundred seventeen".