152640317 has 2 divisors, whose sum is σ = 152640318. Its totient is φ = 152640316.

The previous prime is 152640289. The next prime is 152640329. The reversal of 152640317 is 713046251.

152640317 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152053561 + 586756 = 12331^2 + 766^2 .

It is an emirp because it is prime and its reverse (713046251) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-152640317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 152640317.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152640347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76320158 + 76320159.

It is an arithmetic number, because the mean of its divisors is an integer number (76320159).

Almost surely, 2^152640317 is an apocalyptic number.

It is an amenable number.

152640317 is a deficient number, since it is larger than the sum of its proper divisors (1).

152640317 is an equidigital number, since it uses as much as digits as its factorization.

152640317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 152640317 is about 12354.7689982452. The cubic root of 152640317 is about 534.4286759210.

Adding to 152640317 its reverse (713046251), we get a palindrome (865686568).

The spelling of 152640317 in words is "one hundred fifty-two million, six hundred forty thousand, three hundred seventeen".