1445391377 has 2 divisors, whose sum is σ = 1445391378. Its totient is φ = 1445391376.

The previous prime is 1445391373. The next prime is 1445391397. The reversal of 1445391377 is 7731935441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1429142416 + 16248961 = 37804^2 + 4031^2 .

It is an emirp because it is prime and its reverse (7731935441) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1445391377 - 2² = 1445391373 is a prime.

It is a super-2 number, since 2×1445391377² = 4178312465411912258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1445391373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722695688 + 722695689.

It is an arithmetic number, because the mean of its divisors is an integer number (722695689).

Almost surely, 2^1445391377 is an apocalyptic number.

It is an amenable number.

1445391377 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445391377 is an equidigital number, since it uses as much as digits as its factorization.

1445391377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 44.

The square root of 1445391377 is about 38018.3031841244. The cubic root of 1445391377 is about 1130.6507794952.

The spelling of 1445391377 in words is "one billion, four hundred forty-five million, three hundred ninety-one thousand, three hundred seventy-seven".