1445687317 has 2 divisors, whose sum is σ = 1445687318. Its totient is φ = 1445687316.

The previous prime is 1445687279. The next prime is 1445687351. The reversal of 1445687317 is 7137865441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1356743556 + 88943761 = 36834^2 + 9431^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445687317 - 2¹⁵ = 1445654549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1445687357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722843658 + 722843659.

It is an arithmetic number, because the mean of its divisors is an integer number (722843659).

Almost surely, 2^1445687317 is an apocalyptic number.

It is an amenable number.

1445687317 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445687317 is an equidigital number, since it uses as much as digits as its factorization.

1445687317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 564480, while the sum is 46.

The square root of 1445687317 is about 38022.1950576239. The cubic root of 1445687317 is about 1130.7279401321.

The spelling of 1445687317 in words is "one billion, four hundred forty-five million, six hundred eighty-seven thousand, three hundred seventeen".