1445623317 has 12 divisors (see below), whose sum is σ = 2096790124. Its totient is φ = 959748480.

The previous prime is 1445623273. The next prime is 1445623343. The reversal of 1445623317 is 7133265441.

1445623317 is a `hidden beast` number, since 14 + 4 + 5 + 623 + 3 + 17 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 947039076 + 498584241 = 30774^2 + 22329^2 .

It is not a de Polignac number, because 1445623317 - 2⁶ = 1445623253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445623357) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 331078 + ... + 335415.

Almost surely, 2^1445623317 is an apocalyptic number.

It is an amenable number.

1445623317 is a deficient number, since it is larger than the sum of its proper divisors (651166807).

1445623317 is a wasteful number, since it uses less digits than its factorization.

1445623317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666740 (or 666737 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 1445623317 is about 38021.3534346162. The cubic root of 1445623317 is about 1130.7112542611.

Adding to 1445623317 its reverse (7133265441), we get a palindrome (8578888758).

It can be divided in two parts, 14456 and 23317, that added together give a palindrome (37773).

The spelling of 1445623317 in words is "one billion, four hundred forty-five million, six hundred twenty-three thousand, three hundred seventeen".